A 1×1 invisible pixel <img> tag used to track if a user has visited a page or not. It can also be used for the following:
- If users visit one webpage or not.
- If users open email or not.
- If users see an advertisement or not.
Basics of How it works
When your browser/email load the <img> html tag, the source side server gets notified and record this load event. Additional information about the load can be transmitted via url parameters.
Code Example:
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<span class="tag"><img</span> <span class="atn">src</span><span class="pun">=</span><span class="atv">"http://example.com/pixel.php?s=value1&b=value2&c=value3"</span><span class="tag">></span> |