The Meta Pixel is a piece of tracking code installed on your website that sends data back to Meta about visitor actions, enabling you to measure ad performance, build targeted audiences, and optimise campaigns based on what users do after clicking your ads.
What does the Meta Pixel track?
The Pixel tracks events: specific actions users take on your website. Standard events include page views, product views, adds to cart, checkout initiations, and purchases. Custom events can be configured for actions specific to your business, such as form submissions, lead form completions, or appointment bookings. Each event can include parameters such as value, currency, and product ID, which give Meta more signal for optimisation and reporting.
How does the Meta Pixel use this data?
Meta uses Pixel data for three main purposes. First, for conversion tracking: you can see which ads led to which actions on your site. Second, for retargeting: you can build audiences from people who visited specific pages or completed specific actions, and target them with relevant ads. Third, for optimisation: when using conversion objectives, the algorithm uses Pixel data to find users who are most likely to take the action you care about.
[Screenshot: Meta Events Manager showing a list of active pixel events with event names, counts in the last seven days, and match quality scores. Alt text: Meta Events Manager dashboard showing pixel events with event names, recent event counts, and match quality indicators.]
How do I install the Meta Pixel?
The Pixel is created in Meta Events Manager and installed by adding the base Pixel code to every page of your website, typically in the site header. Events are then added to specific pages or triggered by specific user actions. On platforms such as WordPress, plugins can handle installation without manual code editing.
For websites built in straight HTML or custom platforms, a developer needs to add the code directly. We verify Pixel installation and event firing for all clients running Meta ads.
Does the Meta Pixel still work after iOS privacy changes?
Apple's iOS 14 and subsequent updates introduced App Tracking Transparency, which significantly reduced the data Meta can collect from users on Apple devices. Meta responded by introducing the Conversions API, a server-side tracking method that sends data directly from your web server to Meta rather than relying on the browser-based Pixel alone. Running both the Pixel and the Conversions API together recovers a substantial portion of the data lost to browser restrictions and gives the algorithm better signal for optimisation.
Related KB articles:
• What is a Custom Audience and How Do I Create One
• What is a Conversion in Digital Marketing
External links:
• Meta, set up the Meta Pixel