> For the complete documentation index, see [llms.txt](https://docs.pos.pages.fm/pos/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pos.pages.fm/pos/english/advanced-features/optimize-purchase-event-conversions-with-facebook-capi-2024/some-basic-definitions-with-capi.md).
# Some basic definitions with CAPI
From 2024, conversion events such as Purchases will be transferred to Facebook Ads Manager in a new way, called CAPI for short. Customers need to install it to be able to sync events (such as Purchases) to Ads Manager.
{% hint style="info" %}
If you read the documentary and are still confused, what should you do to install CAPI? The answer is **To-do-Nothing.**
Pancake and Meta have AUTOMATICALLY moved all customers to CAPI, so unless there is a special purpose (setting up CAPI for IG, controlling data sets on Event Manager,...) you don't need to do anything else. .
{% endhint %}
## 1. What is CAPI (Conversion API)?
CAPI - Conversion API is a new way for third-party applications (like Pancake) to transfer order data to Facebook, storing it in a Dataset. Based on this data, Facebook will be able to automatically learn and optimize ads to better reach your customer base. From there, your advertising will be more effective
**CAPI** is different from **Event API**, you only need **ONE API** for all event data from different sources.
Unlike the previous **Event API**, you need to set up **CAPI** for your site to be able to synchronize order data.
See details about **CAPI** according to Facebook's documentation [here](https://www.facebook.com/business/help/2041148702652965?id=818859032317965)
## 2. Dataset
**Dataset** help you connect and **manage event data** from different sources. This source can be websites, mobile applications, over-the-counter sales data, messaging data from third parties such as Pancake,...
Or we can say, **the dataset** will be the place to store all the activities from different sources that you connect.
{% hint style="info" %}
**Example:** You have dataset X linked to Facebook page A, Instagram page B, WhatsApp page C. Then, you link dataset X to all 3 pages above via CAPI, all event data of 3 pages above will be recorded in data file X
{% endhint %}
See details about the Facebook data file [here](https://www.facebook.com/business/help/750785952855662?id=490360542427371)
## 3. Manage dataset
You may have many different dataset, to manage the dataset you will need to use **Event Manager**.
**Meta Event Manager** is a tool that helps you track and manage event data. Here, you can install, monitor, and debug the data sources you have installed. You can also use **Events Manager** to cross-compare events from different sources, or create customer files.
Manage dataset at the link:
See details about Event Manager [here](https://www.facebook.com/business/help/898185560232180?id=1205376682832142)
