Are those that allow the user to navigate through a website, platform or application and use the different options or services that exist therein.
Cookie necessary for the use of website options and services.
Cookies generated by PHP language-based applications. This is a general purpose identifier used to maintain user session variables. It is usually a randomly generated number, how it is used can be site-specific, but a good example is maintaining a logged-on session in the state of a user between pages.
Are those that allow the person responsible for them to monitor and analyse the behaviour of users of the websites to which they are linked.
The _ga cookie, installed by Google Analytics, calculates visitor, session and 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, _gid cookie 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.
This cookie is installed by Google Universal Analytics to restrain request rate and thus limit the collection of data on high traffic sites.