Facebook Attribution provides two types of impression tags, image tags and JavaScript impression tags. These tags have different capabilities and URL components.

Image version of an impression tag:

• Contains "img" (https://ad.atdmt.com/i/img;...).
• Returns a cookie ID (if one isn't already set), along with a single pixel (1x1).
• Enables attribution reporting.

JavaScript version of an impression tag:

• Contains "js" (https://ad.atdmt.com/i/t.js;...).
• Returns additional JavaScript code to your browser, which is used to measure viewability and fraud.
• Must be used if you wish to measure viewability; also enables attribution reporting.

Learn more about preparing tags.

* Nguồn: Facebook