||This page in a nutshell: Spam is the inappropriate addition of links or information to Wikipedia with the purpose of promoting an outside organization, individual or idea, and is considered harmful to the encyclopedia. Do not disrupt Wikipedia with spam. If you find spam, please remove or rewrite the content.
There are three main types of spam on Wikipedia. These are: advertisements masquerading as articles and contributions to articles; external link spamming; and adding references with the aim of promoting the author or the work being referenced.