Add to Del.iciou.us - What is this for?

Question

I see that on the plus sign below the answer button on all the question. What is it and how is it used?

Thanks

Answer 1

Its a social bookmark

http://del.icio.us/

Answer 2

http://del.icio.us is a social bookmarking site. Basically, if you have an account, you can add or save a link in that site. From there, you can access your bookmarks whenever you go to your site.

Since it's a social bookmarking site, del.icio.us allows you to share your bookmarks to everyone in the world.

Try it out!

Answer 3

This will add the questions and answers to the website Del.iciou.us, its an article submission website.  Articles are submitted here and people rate them.