1. Sending a large number of messages to users that
did not ask for them. 2. Also, a term used to describe when a website designer
incorporates extra and irrelevant information on a web page, usually as word
lists or as text hidden in the background, for the purpose of making the search
engines find these words and display their site at the top of the index listing. This practice
interferes with providing others with quality searches and is strongly
discouraged. When detected, some search engines will automatically remove the
pages from their index.