With the openness of editing that wikis provide, spammers have expanded from blog and guestbook spam to wikis. As usual this takes the form of placing links on various pages in a wiki to increase a certian site's relevance in Google and other search engines.

Unlike blog spam, which leaves links as comments, wikispam is often destructive, as when spammers placing their spam on a page do not care that it replaces existing content. However some spammers attempt to sneak their links into existing content, this sometimes results in the changes going undetected. Most wikis maintain a revision history as a result is can be fairly easy to revert the wiki to clean revision.