What is a "Facebook Pixel" and how does it work?

What is a "Facebook Pixel" and how does it work?

I am pretty sure a developer created and configured my Facebook page with a "Facebook Pixel" but I am on my own now, and need to understand it better.

How do I find it if it does exist? What does it do exactly?

Is there an email address associated with it? If so, can I find what that email address is?

Secondly, I am trying to connect it to an EverWebinar, so when the Facebook user clicks the "Sign Up" button on my Facebook ad, the sign-up page pops up. Does this mean EverWebinar also needs to get that pixel?

What does a Facebook Pixel file look like?

Thanks
curiouswebsterSoftware EngineerAsked:
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David Johnson, CD, MVPRetiredCommented:
A Facebook Pixel resides on your website and not the Facebook Page.
Each pixel can be used to track different user activities
Fran MaitaAnalistaCommented:
Facebook Pixel stopped working since February 15, 2017 and at this time is only used to create ads and set up conversation. It is very easy to configure it. Enter the "Quick Help" button, type "Pixel" and then a series of information is displayed as a guide to the configuration.
Pixel-Facebook.jpg

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curiouswebsterSoftware EngineerAuthor Commented:
thanks
Scott Fell, EE MVEDeveloper & EE ModeratorCommented:
What you are referring to is tracking code much like Google Analytics.  
https://www.facebook.com/business/learn/facebook-ads-pixel
When someone visits your website and takes an action (for example, buying something), the Facebook pixel is triggered and reports this action. This way, you'll know when a customer took an action after seeing your Facebook ad. You'll also be able to reach this customer again by using a custom audience. When more and more conversions happen on your website, Facebook gets better at delivering your ads to people who are more likely to take certain actions. This is called conversion optimization.
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