Social bookmarking is the practice of saving bookmarks (favourites) to a public web site so they can be accessed from any computer or shared with other people.
The bookmarks can also be "tagged" to help you find a particular bookmark at a later date.
If you come across a particular page on the website that you find interesting or wish to share with others you can save it for future reference.
Just click one of the social bookmarking links at the bottom of this website.
You need to be registered with the social bookmarking websites to be able to save a page.
Social bookmarking websites
More details about the social bookmarking websites can be found below:
To register with StumbleUpon visit, https://www.stumbleupon.com/signup
For more information about StumbleUpon visit, http://www.stumbleupon.com/about