Use in Forums
Some forums may allow the tag . It is used similarly to the tag and should be used with an image filename to display as the post background.
Many message boards include a FAQ with information on how to use their own variants of BBCode. In addition, some bulletin board systems allow administrators to define their own custom BBCodes. This is usually done by asking them to specify the BBCode markup (utilizing variables/wildcards to indicate the user-customizable parts of the code) and then indicating the XHTML replacement which will be substituted for the BBCode.
Web 2.0 progression of BBCode sees the uncommon occurrence of new tags such as, and tags.
Read more about this topic: BBCode