The Facebook pixel is an analytics tool that allows to measure the effectiveness of advertising by understanding the actions people take on website.
It uses to:
Make sure that ads are shown to the right people. Find new customers, or people who have visited a specific page or taken a desired action on your website.
Drive more sales. Set up automatic bidding to reach people who are more likely to take an action that care about, such as making a purchase.
Measure the results of ads. Better understand the effect of ads by measuring what happens when people see them.
Once set up the Facebook pixel, the pixel will fire when someone takes an action on your website. Examples of actions include adding an item to their shopping basket or making a purchase. The pixel receives these actions, or events, which can view on Facebook pixel page in Events Manager. From there, will be able to see the actions that customers take. Also have options to reach those customers again through future Facebook ads.
Download Extension and extract file
Copy 'Widgets.FacebookPixel' folder and paste to '~/Plugins/' folder
Reload the 'list of plugins' in Admin panel and Install 'Facebook Pixel' Plugin