![]() That means when you visit a webpage of some random site - I’ll use as my example - your browser says something to the effect of: ![]() It’s exactly what it sounds like: a single-pixel image (often invisible) referenced somewhere on the page. ![]() Many sites with a Facebook presence - like Ask Leo! has its Facebook Page - are encouraged by Facebook to add what’s called a tracking pixel or Facebook pixel. So what does that have to do with Facebook? So knows you fetched a page, and it knows you fetched an image. Hey, ! Could I get “wp-content/uploads/2021/11/keyhole-spy-2048×” from you, please?.It finds instructions on the page that an image is required, so it then also asks: Hey, ! Could I get “how-does-facebook-track-me-even-if-i-dont-have-an-account” from you, please?.So when you display this page, in addition to the browser saying: (Details of that URL may change due to caching, but the concept remains the same.) For example, when this page is displayed, your browser finds an instruction to display an image, which is then fetched from this location: When an image is displayed - be it in email or on a website - it has to be fetched from somewhere. It’s one of the reasons email programs generally disable images by default. This same technology is also used by advertising networks and others for similar purposes. Because many websites use Facebook-supplied tracking technology, including the “Facebook pixel”, it’s easy for Facebook to collect information about your activities whether you have a Facebook account or not.
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