Pixel / Marketing Terms Pixel A pixel in digital marketing is a small piece of code embedded on a website that tracks user interactions and behaviours. Also called a tracking pixel or marketing pixel, it silently collects data such as page views, purchases, and clicks, helping marketers understand how users engage with their content. This information is essential for measuring conversions, building remarketing lists and improving the performance of advertising campaigns. For example, the Facebook Pixel can track specific actions such as when a visitor lands on a product page, adds an item to their cart or completes a checkout. That data is sent back to Facebook and can be used to retarget the user with relevant ads or create lookalike audiences. Similarly, Google Ads and LinkedIn offer their own tracking pixels that integrate with ad accounts to refine targeting, inform bidding strategies and attribute conversions more accurately. Although invisible to site visitors, pixels play a vital role in campaign optimisation. They enable personalised ad delivery, support A/B testing and provide insights that help marketers adjust creative and budget in real time. For B2B and SaaS companies, pixels help guide prospects through complex sales funnels by tracking engagement at different stages. For nonprofits, they assist in promoting donations, event registrations or volunteer signups by reaching supporters who have shown interest. To use pixels effectively, ensure they are installed correctly, comply with privacy laws and are integrated with your analytics and ad platforms.