^ that info is out of the cookies saved in ur PC, showing u add for what ure searching. Its not PW.
It has nothing to do with cookies. It however has everything to do with Google search being used. Google remembers what you search for and then tailors adwords delivery according to that.
Cookies just store information that you fill out on sites, such as usernames, last visits etc. The only thing that can "read" a cookie is the site which makes it or a text editor if you start popping open cookie files in your browser's temp folder.