When gmail accounts are successfully logged in, software will create cookies and profiles for these gmail accounts and save them in Cookies folder.
The difference between Profiles and Cookies: Profiles save all login information and characteristics of the login device such as Device type, screen size, video card, etc. while Cookies only save the login state. Using profiles will consume hard drive space, the more you run, the larger capacity of each profile takes, but in return it will increase reliability and reduce the drop of views, subs, and likes. Using cookies takes almost no space, but is not as reliable as using profiles. Gmail’s cookies will expire within a month, then if you run with cookies, you have to delete the cookies folder and let Gmail log in again. If running with Profiles, the login status of Gmail is permanently maintained except Gmail accounts are blocked (Phone verification, Disabled).
More info: https://autobotsoft.com/increase-youtube-views-using-software-abs-youtube-tool/