Full definition
Facebook Pixel is a snippet of JavaScript code installed on your site. It tracks visitors and enables retargeting, conversion tracking, and optimization for Facebook ads. It's essential for anyone running paid Facebook advertising.
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Why it matters
Without a pixel you are flying blind: you cannot build audiences, measure conversions, or know which ad actually produced a customer.
🧮 A worked example
Installing the pixel before a campaign starts lets you build a site-visitor audience. Without it you only begin collecting on the day you install it.
⚠️ The common mistake
Installing a pixel and never configuring conversion events. It will collect page views and never distinguish a casual visitor from someone who left an enquiry.
Full guide on the blog
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