Pixel tracking is the most commonly used mechanism to track the conversions. Similar to other pixels, Facebook tracking script (also called pixel) is put on every website page which you want to track. To track the conversions, pixels are placed on the post check-out page of your website.
Exploring the site I have seen this topic, going to share something really easy and helpful to begin with Facebook pixel. I recently use WinAds Manager it manages retargeting campaigns efficiently and you can target the right audience with simple steps.
The Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising by understanding the actions people take on your website.