Editing Metasearch engine (section)

=== Link spam ===
Link spam are links between pages present for reasons other than merit. Techniques include:
* Link-building Software – Automating the [[search engine optimization]] (SEO) process
* Link Farms – Pages that reference each other (also known as mutual admiration societies)
* Hidden Links – Placing hyperlinks where visitors won't or can't see them
* Sybil Attack – Forging of multiple identities for malicious intent
* Spam Blogs – Blogs created solely for commercial promotion and the passage of link authority to target sites
* Page Hijacking – Creating a copy of a popular website with similar content, but redirects web surfers to unrelated or even malicious websites
* Buying Expired Domains – Buying expiring domains and replacing pages with links to unrelated websites
* Cookie Stuffing – Placing an affiliate tracking cookie on a website visitor's computer without their knowledge
* Forum Spam – Websites that can be edited by users to insert links to spam sites