Installed by Google Analytics, calculates visitor, session, campaign data, and also keeps track of site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors.
Installed by Google Analytics, stores information on how visitors use a website, while also creating an analytics report of the website's performance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously.
Installed by Google Universal Analytics to restrain the request rate and thus limit the collection of data on high-traffic sites.