OK,
del.icio.us is like a social bookmarking "thing". You set up a free account and then you save your bookmarks there. But that's not it; when you bookmark a page, you mark it with tags. So not only can you see your bookmarks, you can see everyone else's by looking at specific tags. They offer an RSS feed for each tag, so what you see below are links to SUSE and Linux-related tags; you click on the link and you see what pages have been recently bookmarked, get it? It's just a way to present some links to SUSEroot visitors. You can read their official explaination
here.