Editing Metasearch engine (section)

=== Content spam ===
Content spam are the techniques that alter the logical view that a search engine has over the page's contents. Techniques include:
* Keyword Stuffing – Calculated placements of keywords within a page to raise the keyword count, variety, and density of the page
* Hidden/Invisible Text – Unrelated text disguised by making it the same color as the background, using a tiny font size, or hiding it within the HTML code 
* Meta-tag Stuffing – Repeating keywords in meta tags and/or using keywords unrelated to the site's content
* Doorway Pages – Low quality webpages with little content, but relatable keywords or phrases
* Scraper Sites – Programs that allow websites to copy content from other websites and create content for a website
* Article Spinning – Rewriting existing articles as opposed to copying content from other sites
* Machine Translation – Uses machine translation to rewrite content in several different languages, resulting in illegible text