Google is the world's leading search engine. Google also provides a wide range of free services like maps, web-based email, etc.
Google's mission is to organize the world's information and make it universally accessible and useful.
I have tried Delicious, Diigo, Google Bookmarks, you name it. Xmarks is the best cloud bookmarking system out in the market. With the plug-in, It integrates seamlessly with different browsers ( I use Firefox and Chrome), so you can keep working in the SAME WAY you always did. No extra copy-paste or different drop-down menus. You can also create different user profiles, add notes to your bookmarks, and many more. Excellent app!!