What's a bookmark?

Bookmarks are Web page locations (URLs) that can be retrieved. As a feature of all modern Internet web browsers, their primary purpose is to easily catalog and access web pages that a user has visited or will visit, by keyword rather than by address (URL). Groups of related keywords are often used to describe the URL making it easier to find it again.

With the advent of social bookmarking, shared bookmarks have become a means for users sharing similar interests to pool web resources, or to store their bookmarks in such a way that they are not tied to one specific computer or browser. Web-based bookmarking services let users save bookmarks on a remote web server, accessible from anywhere.