Spam in blogs (also called simply
blog spam, comment spam, or
social spam) is a form of
spamdexing. (Note that
blogspam also has another meaning, namely the post of a blogger who creates posts that have no added value to them in order to submit them to other sites.) It is done by posting (usually automatically) random comments, copying material from elsewhere that is not original, or promoting commercial services to
blogs,
wikis,
guestbooks, or other publicly accessible online
discussion boards. Any web application that accepts and displays
hyperlinks submitted by visitors may be a target.