Let's begin with a simple definition of a web beacon.

It's an object embedded into an email, to determine if a user accessed the content sent. There are other names used for web beacons such as tracking pixel, invisible pixel, pixel tag, pel and clear gif.

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Tracking emails

Web beacons are often used in email marketing to determine which recipients open the email. Doing this allows digital marketers to see which recipients have viewed or interacted with the email they sent.

Email marketing tracking is not a perfect science, as tracking can be disabled by recipients who do not use HTML email clients, opting for text only emails. Some email preferences like turning off image display (while still using HTML), can also disable web beacons.

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