On some websites visited links look exactly the same as unvisited links. This doesn’t always cause problems, but sometimes it can slow you down. As an example I’ll compare two sites that have lots of outgoing links: Delicious and Twitter.
Let’s say you’re looking for interesting reading about a particular subject like… HTML5. There will be plenty of links tagged with HTML5 on both Delicious and Twitter:
Posted in Accessibility, Quick Tips, Usability.