Browsers Cache: deletes the files created when loading Internet pages in the Web browser.
Download Cache: deletes cache-files created when files are downloaded from the Web.
Browsers History: deletes the list of pages that Web browsers keep to make pages load more quickly.
Recent searches: allows you to remove the recent searches that the Web browsers store.
Bookmark icons: Many Web sites specify an icon (called a "favicon") which displays in the Address bar and alongside Bookmarks and addresses in the History menu. This option deletes the icons.
Form Values: The info that you type in the forms of Web sites are saved in a cache. This option deletes the cache.
Cookies: Many Web sites store small files, named "cookies," on your computer, to make return visits easier; for example, it will spare you having to type your name and password when returning to a forum, etc. This option deletes those cookies.
Form values and cookies (may) spare you the typing of user-names, passwords and other required info when you revisit a web-form (as in forums, online-shops etc.). Use with caution!