What is Spam?
Webspam or Spam is online content that was made to manipulate its ranking in search engine results. This can involve keyword stuffing, cloaking, or using excessive links.
More About Spam
User-generated spam happens when users comment links that point back to their own website. Rather than gradually developing natural backlinks, website owners can also pay other sites to feature backlinks on their pages. Webspam can also involve link schemes, in which users purchase links or publish a large number of guest posts to manipulate search engines.
To protect your site from webspam, it’s a good idea to avoid automatically-generated content. You can also disable public comments until they are approved.