Facebook has ushered in a whole new era of communication and sharing on the Web. With the over 500 million active users as of 2011, many people use the site as a primary way to communicate. Linking profiles, better known as "tagging" on Facebook, is a way to place clickable links, in the form of a name, going directly to the profile of another person. There are two forms of tagging on Facebook: photo tagging and post tagging. Both of these allow links directly to other profiles.
When a photo is tagged on Facebook, it means that the people in the photo have been identified by name. When a Facebook users examines the photo, moving the computer cursor over the faces in that photo, names will appear. Underneath the photo is a list of the names -- the people in the photo -- and each name is a clickable link. If you click a tagged name, you'll be taken to that person's Facebook profile page.
Post tagging follows the same principles as photo tagging but isn't associated with a photo. When you want to insert a link that goes to another Facebook user's profile into a wall post or a status update, you can do so by inserting the "@" character directly in front of the name that should be linked. The linked name will appear in a blue text, indicating that it can be clicked, while all other text will be the standard black color.
Post Linking Restrictions
Facebook users may not use post tagging to link to another profile unless the profile being linked to is on their friends list. For example, you can always type the name of another person into status updates or wall posts, but placing the "@" symbol in front of that name will never produce a profile link unless that person's name is already part of your Facebook friends list.
Photo Linking Restrictions
Photos can be tagged with the names of all people in the photo; however, only the names of other Facebook members will appear as a clickable link. All other names will appear in standard black text. It's not necessary to be on the friends list of the person who created the photo tag to be tagged with a clickable profile link.
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