single php
cdp menu

Here’s all you need to know about Facebook Conversions API



Unveiling the power of Meta Conversions API: Everything You Need to Know - blog banner designed by Swathy Venkatesh from CustomerLabs.

For over a decade, we all loved Meta’s ad performance with higher ROAS and returns. That’s being challenged now by changing privacy regulations, and browser updates and raising concerns over privacy by users themselves.

There were many rules and regulations around data privacy. Third-party data cookies being blocked, user privacy concerns, iOS14+ updates, including the recent iOS17 update are some of them.

These rules and regulations have comfortably made users opt out of tracking. One such hit is the declining effectiveness of Facebook Pixel tracking. This had a direct impact on the performance of advertising. 

Witnessing this issue, the Facebook has crafted a solution revolving around first-party data involving the utilization of Facebook Conversions API. This solution will enable the secure transfer of first-party data to the Meta while prioritizing user privacy. 

Let’s know about what Facebook Conversions API is, how to set it up, its best practices, and more…Dive in!

What is Facebook Conversions API?

The Facebook Conversions API (CAPI) is a tool that allows advertisers to send first-party data or events, from their websites, apps, or servers – to Meta on the server-side. 

Proper set up of CAPI helps the ad platform’s algorithm to receive the audience signals without any loss.

Role of Conversions API

  • The Conversions API will be able to track in-app purchases, registrations, content downloads and all other user behavior.
  • The Conversions API helps marketers to attribute conversions to specific ad clicks across the devices. 
  • Benefits marketers with a deeper understanding of funnel actions beyond clicks and impressions.
  • Leverage conversions for measurement, automation, and optimization.
  • Ingests rich conversion metadata like revenue, items purchased, and custom parameters.
How Conversions API works with CustomerLabs CDP.

Why did Facebook create the Conversions API?

Due to data privacy updates and browsers blocking third-party data cookies, the effectiveness of Facebook Pixels (a code written on the browser side to track users’ data) saw a constant decline in providing customer information. 

There were concerns. There was a rift when it came to concerns that needed to be addressed by businesses for users’ data. Concerns that needed to be addressed by Facebook for marketers.

  1. Privacy Concerns: Amid the rise of stringent data protection regulations like the General Data Protection Regulation (GDPR), Consumer Data Protection Act (CDPA), Google Chrome’s plan ‘to phase out third-party cookies’ and others- have all posed threats to conventional tracking methods. In response to this, Conversions API emerged as a solution (on the server side) to precisely track while upholding user privacy. 
  1. Decrease in Pixel Reliability: As mentioned earlier, there are many rules like ad blockers, and the limitations of browser-side tracking, have created obstacles for Facebook’s Pixel data tracking. By introducing Conversions API, Meta aimed to provide advertisers with a more reliable server-side-based solution.
  1. Future-Proofing Advertising Strategies: Meta being aware of the traditional tracking methods becoming obsolete, started taking measures to ensure advertising platforms remain relevant in the future. To achieve this, Meta has introduced an alternative approach enabling advertisers to monitor conversions efficiently. This approach is the Conversions API. 

The concerns were put forth, hence solutions were readymade!

Maximize Your Meta Ad Campaign Performance With First-party Data

How Conversions API Enhances First-Party Data Adoption?

  1. Direct & Reliable Data Connection: The Conversions API ensures a more secure and robust exchange of users’ data. It reduces the risk of signal loss caused by ad blockers and browser limitations. By using Conversions API, businesses can effectively adopt first-party data, gaining valuable insights into user behavior without solely relying on third-party cookies or client-side tracking. 
  1. Improved Ad Targeting & Personalization: With more understanding of users interactions through first-party data has made businesses hyper-target their ad campaigns. Facebook Conversions API joining hands with Facebook Pixel has benefited advertisers to obtain valuable customer behavior insights across various stages of the sales funnel. This has led to better ad performance and higher conversion rates. 
  1. Strengthen Data Control and Privacy Compliance: With Conversions API, businesses have greater control over the data they share with Facebook. With user data being collected on the server side, advertisers can exercise tighter management of the collected data ensuring adherence to data privacy regulations. This fosters trust among customers knowing their privacy will be protected and respected. 

How does Facebook Conversions API (CAPI) work?

The Conversions API works by establishing a direct connection between an advertiser’s marketing data and Meta. It helps to optimize ad targeting, measure outcomes, and decrease the cost per result. It enables businesses to send various types of data such as events, such as website events, app events, and offline conversions. The data is sent from their servers, website platforms, mobile apps, or CRM systems to Meta through server-side.

Meta's infographic explaining Facebook Conversions API.

For example, when a user clicks on a Facebook Ad of an e-commerce website, and makes a purchase on that site, the advertiser’s conversion tracking server captures the user ID, timestamp, item purchased and revenue when the purchase event occurs. 

This purchase conversion data will then be sent to Facebook via Conversions API. Facebook then will attribute this purchase conversion to the previous Facebook Ad that the user had already clicked. 

In the Ads Manager, advertisers will be able to see a purchase conversion attributed to their Facebook Ad as a result of implementing Facebook Conversions API. 

For instance, when you land on a website, your data will be collected on the server side and will be sent to Facebook’s server through FB CAPI. Which will ultimately maximize ad campaign performance on Facebook Ads. 

How to Set Up Facebook Conversions API?

Setting up CAPI is not a cakewalk!

Meta Conversions API can be set up in two ways; implementing CAPI manually or with the help of developers. This involves a lot of steps and procedures starting from setting up a Facebook business account to creating pixel. It involves various steps to accomplish setting up Conversions API. Not to forget that you would need the help of a developer t o set up CAPI unless you have direct integration from platforms like Shopify, WordPress, WooCommerce, BigCommerce, Magento, etc.,

We at CustomerLabs, have come up with a unique method to track all offline events and online events, without any help from developers or involving writing a single line of code. 

Just install our tag and set yourself free! 

Note: Conversions API set up through CustomerLabs First-party data CDP is far more better compared to the CAPI by Shopify itself. It is because of the fact that CustomerLabs sends numerous parameters that help Meta identify the users.

Here’s a quick step-by-step guide for setting up the Conversions API of Facebook. 

Infographic showing Step-by-Step procedure to show implementation of FB CAPI or the Meta Conversions API in less than half an hour or 30 minutes!

Activating First-Party Data through Facebook Conversions API Across the Customer Funnel

Any businesses will have 3 objectives to leverage their first-party data through the Facebook Conversions API;

  1. Prospecting
  2. Optimization
  3. Re-engagement
Screenshot of Meta: Image explaining three business objectives to leverage first-party data through Facebook Conversions API.


When a customer lands on your website, it marks the beginning of their interaction with your brand’s product or service. This interaction is an opportunity for your business to get valuable information about the customers. In this stage, utilization of first-party data can help you to reach new customers who have never interacted with your brand or reach out to prospective users who have interacted but haven’t purchased. 

Take the example of Hyundai,

Screenshot of Hyndai case study done by Meta.

By using conversion leads optimization saw an average of 20% increase in lead-to-sale conversion rate. It also saw 42% more qualified leads and a 29% decrease in cost per qualified lead. 


Once after collecting data about new customers, their preferences, behavior, and interactions – all of this information can be used to create personalized ad campaigns tailored to specific audience segments. Additionally, by using first-party data, you can identify and target high-value customers who are likely to generate significant revenue over time. To gain these lifetime valued customers, optimizing ad campaigns through first-party data will be of help.

Screenshot of "Fever" case study done by Meta.

Fever, a global entertainment discovery platform, by making use of the optimization strategy in Facebook Conversions API has begun to understand its customer journey. With this, they combined both Conversions API and Custom Conversions, saw a 2.1X increase in ROAS, 2.4X increase in content view, 2.8X lower cost per purchase, and 2.4X lower cost per view content. 


Now when a customer has landed on your website, he/she might have made some engagement with your product or service. Here, first-party data along with Facebook CAPI can be utilized to drive loyalty with acquired customers for re-engagement. This can be done by implementing re-engagement tactics – through cross-selling or upselling. Additionally, one main advantage of re-engaging customers is that it can help reduce churn and retain customers. 

CustomerLabs Case Study of W for Woman.

Here, let’s take the example of how W for Woman, India’s largest fashion brand, has achieved match rates beyond 80% using re-engagement strategies. After getting their first-party data handy, W for Woman started engaging those who visited the website for the last 180 days, viewed content, or purchased for the last 30 days and retargeted them by luring them to purchase other products. 

With this, they have achieved a 2X times increase in ROAS, a 35% reduction in Customer Acquisition Cost, and 10% revenue solely from first-party data. 

The Image contains W for Woman Case Study Download Button
The Case Study is about how W For Woman leveraged first-party data to get better results

With activation, let’s now take a look at the powerful applications of CAPI. 

Powerful Applications of the Conversions API

With the digital landscape taking a rollercoaster, businesses are looking out for innovative ways to optimize their online presence. Facebook has crafted the Conversions API tool from which marketers can benefit. 

Attribution Modeling

The Conversions API for attribution modeling, sends accurate and comprehensive data about customers’ journeys and actions. Behavior data such as purchases, sign-ups, or any other conversions) are sent directly from the server to Meta’s server. Thus, you can attribute conversions to specific touchpoints. 

Lookalike Modeling

Facebook Conversions API allows businesses to send quality customer information directly from their server to Meta. Using Meta’s value-based lookalike audience feature you can create audiences similar to high-value customers. This top of the funnel audiences are very high intent and are high-value. This audience is highly likely to take desired actions. 

Predictive Analytics

Facebook Conversions API facilitates real-time customer information using AI and machine learning for businesses to gain valuable insights about users enabling businesses to build predictive models forecasting user behavior and lure them to engage with products and services. 

Aid Automated Bidding Algorithms

The Conversions API is an important component of Facebook’s advertising system as it supplies Facebook’s algorithms with conversion event data of users that are required to power automated bidding. These conversions involve actions like purchases, registrations, or other specific goals that businesses eagerly wait for. CAPI here enables automated bidding used to tailor bids based on the conversion signals received. 

CRM Integration

For CRM Integration, Facebook Conversions API enables businesses to send customer information and behavior directly from their CRM systems to Meta. This helps in the seamless transfer of user information helping businesses to better understand customer preferences and tailor ad campaigns. 

Cross-device Tracking

Facebook CAPI helps marketers in tracking and sending user behavior data from their server to Facebook, ensuring whether these conversions are attributed to the correct users irrespective of the devices they use. 

Event Match Quality

Facebook Conversions API enables marketers to  measure and optimize their ad campaigns by enabling them to send direct event data of customers from their websites or apps to Facebook. Here, EMQ plays a significant role by rating event match quality as Poor, Okay, Good, or Great. Conversions API helps you send as much data as possible increasing your event match quality

Mitigate the Signal Loss using Conversions API

Best Practices For Conversions API

Let Meta Pixels & Meta Conversions API join hands to provide you with user data;

Facebook recommends that both Meta Pixels and Meta Conversions share the same events simultaneously. For instance, if you are sharing a purchase event using Meta Pixels, you should share the same event using Conversions API. 

This process of sharing the same events is termed a redundant event setup. This setup would help businesses to target more accurate users who are likely to take action. 

But here, you might now be worried that, okay, we will take data from both, but what about duplication? What if I get the same data twice?

For this, Meta has brought in a significant tool called “Deduplication”. So when you are ready with the redundant setup, you may receive the same events from both the browser and the server. Now, when the events are the same and redundant, one event will be kept and the other will be discarded. This process is called deduplication. 

Deduplication is necessary when you are getting information from both the server and browser.

Sharing Events in Real Time… or at least CLOSE to real-time!

The sooner, the better! 

Meta recommends that you share the events of users in real-time with the Meta server. This is because it will be easy for the ad delivery system to evaluate how a person is likely to take the desired action. 

Improve your ad performance by connecting more pixels, expanding integrations;

Here, connecting more pixels to Conversions API integration can help you to improve your ad performance. Think of getting data from both Conversions API & Pixels. You will just have more!

Regularly Monitor Your Connection

To get more out of Meta Ads, CAPI should be used at its maximum, and also regularly monitor the event data being synced. This helps you to find opportunities to improve your setup for better ad performance.

Conversions API + Advanced Matching + Pixel

Meta recommends to have Conversions API set up in combination with advanced matching and pixel. According to the experts at Meta, the ideal set up would look like this – Conversions API, Meta Pixel, Manual Advanced Matching + Automatic Advanced Matching. This helps Meta collate all the data at one place, and get the full picture of the user journey.

Conversions API Vs FB Pixel

When it comes to tracking and measuring conversions on Facebook, two popular methods are used: Facebook Conversions API and Meta Pixels. Both tools offer valuable insights into user behavior and campaign performance, but they differ in terms of data accuracy and privacy concerns. 

Meta Pixels are those which are placed on the website or a landing page. This tracks users’ interactions and sends event data back to Facebook. Whereas, Facebook Conversions API is a strong server-to-server connection enabling more accurate tracking of conversions that occurs outside the web browser. 

With the browser-based limitations, it has become difficult for Facebook Pixels to track user data as they are reliant on users’ browsers but the FB CAPI, being on the server side, accurately tracks and sends data to Meta’s server. 

Why Ponder CustomerLabs Facebook Conversions API?

CustomerLabs CDP has emerged with a unique method to track all the events off & on your website without the need for any complex coding. 

All you have to do is install our tag and relax! Everything is ready within a few hours – From Offline Conversions API to Online Conversions API including the data from CRMs.

We assign an external ID to every single visitor, and we collect IP address, FBC(click ID), FBP (browser ID), user agent, and other parameters (demographics).

The above process is automated. CustomerLabs makes it easy for you to implement CAPI and is one of the best because we offer

  • No-Code CDP
  • Enhanced Event Match Quality (EMQ) 
  • Enhanced Custom Audience Match Rate
  • In Compliance with Privacy Laws
  • White hand glove Support 


With the rapidly evolving technology, concerns surrounding user-data privacy have become paramount. With more rigid rules and regulations being implemented, Facebook has stepped in to take measures of both users’ privacy concerns and marketers’ needs of targeting prospective customers. That is why it has introduced Facebook Conversions API as a game-changing opportunity for businesses. 

With the traditional targeting methods facing challenges, the Conversions API was incorporated to help marketers/advertisers to harness the potential of first-party data while upholding users’ privacy. This offers precise tracking and attribution of conversions; businesses gain deeper insights about customer behavior and enable them to optimize ad campaigns to achieve ROAS and conversions rate. 

Facebook Conversions API empowers businesses to play the game in the era of data privacy playing a major role. By ensuring customers’ trust and delivering personalized experiences without compromising on privacy, Facebook Conversions API helps businesses to embrace the power of first-party data and embark on a new journey of growth, innovation, and customer satisfaction!

Happy Advertising!

Implement Facebook Conversions API with just a single click! Meta Conversions API

Frequently Asked Questions (FAQs)

In simple terms, FB’s CAPI is a bridge between the two servers. One, the Meta Server and the other your server.
Yes, Facebook Pixel fails to track the devices and browsers with the latest privacy updates such as the iOS 14 update, GDPR, and CCPA compliance, while the Conversions API can do.
You can implement Facebook Conversions API manually, or through a NO-CODE Event Tracker of CustomerLabs CDP.
Yes, absolutely. CustomerLabs also integrates your Offline Data using the Offline API. The Offline API is the syncing of offline data collected outside the digital world to the Meta Server. Therefore, you can use the customer information you collected offline.
Offline Conversions API is for the Offline event data. All user data that is collected in the offline world. It can be physical in-store visit or a phone call or any other way a customer interacted with the brand in other than online space. All these events are sent over to Meta through Offline Conversions API

The latest news, perspectives, and insights from CustomerLabs

More Blogs

View all
Facebook Conversion API for Wordpress and how to implement it
How to implement Facebook Conversion API for WordPress

Learn the step-by-step guide to set up Facebook conversions API for WordPress without the developer's help in less than hour.

Read more
Facebook Conversion API (CAPI) for WooCommerce and how to implement it
How to set up Facebook Conversions API (CAPI) for WooCommerce

Learn the step-by-step guide on how to set up a Facebook conversion API for WooCommerce without the help of developers

Read more
Facebook Conversion API for shopify
Facebook Conversions API (CAPI) for Shopify and how to implement it

Learn how to implement Facebook Conversion API (CPAI) for Shopify in simple steps and why is Facebook Conversion API gaining importance now.

Read more

Get started with CustomerLabs CDP

Schedule a 1-1 Demo


Unified data to boost ecommerce growth


Engage your customers across the funnel with a unified martech stack


Increase product metrics with a unified martech stack


Scale your customers quickly with the right data