Email Tracking Pixels: Investigating Their Purpose and Impact on Deliverability
Tracking pixels are small 1 x 1 GIFs that email marketers or email services embed in email HTML code to track when a recipient opened an email, where they did so, and how many times. Simply put, once an email is opened, the tracking pixel sends a signal to the server, which can be used to track the number of people who viewed your message and other metrics. You might have also heard other names of this mechanism like web beacons, tracking bugs, web bugs, web tags, page tags, and pixel tags.