StumbleUpon is a social network for web surfing and sharing webpages and sites that you particularly like and find useful. You can easily surf the web by ‘stumbling’ along – that is, by clicking the stumble button on the toolbar that you can install, allowing you to visit random sites in the categories you choose to explore. As you visit sites, you can like/dislike them, allowing StumbleUpon to learn your likes and dislikes as you surf the web via StumbleUpon.
Being a social network, StumbleUpon allows you to share the sites you visit with friends and others within the StumbleUpon community. Of course, StumbleUpon can be used as a bookmarking type of site, by adding the sites you like to StumbleUpon in a similar way to that of adding favorites/bookmarks to Delicious or your browsers favorites/bookmarks. It’s up to you.
I tend to use StumbleUpon as a surfing tool and haven’t really added a lot to my favorites (I generally forget to do that). For this purpose I have adjusted the settings within StumbleUpon to reflect the topics I like to explore while surfing the web. So it isn’t such a sharing tool for me, as a recommendation tool for the various categories I have checked.
See more at: