A tracking pixel is a tiny, invisible image embedded in emails or web pages that helps companies monitor user behavior. When someone opens an email or visits a website, the pixel loads and sends information back to the sender, such as whether the email was opened or which pages were viewed. This data helps businesses like marketers understand how effective their campaigns are. These pixels are often used in online advertising to measure the success of ads and improve targeting. By analyzing the data collected from tracking pixels, companies can tailor their content to better meet the needs of their audience, ultimately enhancing user experience.