"Tracking mechanisms" refers to tools or systems that are used to monitor or keep a record of something, such as the movement, progress, or actions of a person, object, or process. Full definition
Consult your browser documentation for instructions on how to block cookies and other tracking mechanisms. (makingsenseofcents.com)
The exhibition was free and open to the public and there was no specific tracking mechanism in place to count how many people actually attended. (prospectneworleans.org)
Plus many indie authors don't care about standard tracking mechanisms. (goodereader.com)