A Facebook pixel is code that you place on your website. It helps you track conversions from Facebook ads, optimize ads based on collected data, build targeted audiences for future ads, and remarket to qualified leads—people who have already taken some kind of action on your website.

It works by placing and triggering cookies to track users as they interact with your website and your Facebook ads.

Google Analytics is Google’s powerful and widely used traffic analytics tool that allows website owners to get deep and real time insight into how their site is being used, how much, and by whom.

How do users find your website, how do they move around on it, how long do they stay for, and where do they go from there?

As such, Google Analytics is essentially a user data processing tool.