Web beacon
Web beacon, also known as a web bug, pixel tag, or clear GIF, is a tiny graphic image that is used on websites and in emails for tracking user behavior. It is often used in combination with cookies to collect information about website visitors. Web beacons are typically invisible to the user and are used for marketing and analytics purposes.
One common use of web beacons is in email marketing campaigns. Marketers can track when an email is opened by including a web beacon in the email. This allows them to measure the success of their campaigns and gather data on user engagement.
Web beacons can also be used by third-party advertisers to track user activity across different websites. This information can be used to deliver targeted advertising to users based on their browsing habits.
Overall, web beacons play a crucial role in modern digital marketing by providing valuable data on user behavior and helping businesses make informed decisions about their online strategies.
For more information, you can visit the Wikipedia page on Web beacon.