WK12: Understand the Black Hat SEO

Black Hat SEO methods:
1. Hidden or invisible text - "alt", "no frame" and "no script" sections.
2. Keyword stuffing - insertion of hidden, random text on a webpage to raise the keyword density or ratio of keywords to other words on the page.
3. Repeating keywords in the Meta tags, and using keywords that are unrelated to the site's content
4. Gateway or doorway pages
Creating low-quality web pages that contain very little content but are instead stuffed with very similar key words and phrases. They are designed to rank highly within the search results. A doorway page will generally have "click here to enter" in the middle of it.
5. Scraper sites
Scraper sites, also known as Made for AdSense sites, are created using various programs designed to 'scrape' search engine results pages or other sources of content and create 'content' for a website. These types of websites are generally full of advertising, or redirect the user to other sites.


6. Link farms
Involves creating tightly-knit communities of pages referencing each other, also known humorously as mutual admiration societies
7. Hidden links
Putting links where visitors will not see them in order to increase link popularity.
8. Sybil attack
This is the forging of multiple identities for malicious intent, named after the famous schizophrenia patient Shirley Ardell Mason. A spammer may create multiple web sites at different domain names that all link to each other, such as fake blogs known as spam blogs.
9. Wiki spam
Using the open editability of wiki systems to place links from the wiki site to the spam site. Often, the subject of the spam site is totally unrelated to the page on the wiki where the link is added. While many powerful tool exist to filter or block email spam, there are very few tools for blocking wikispam.
10. Page hijacking is a form of spamming the index of a search engine (spamdexing). It is achieved by creating a rogue copy of a popular website which shows contents similar to the original to a web crawler, but redirects web surfers to unrelated or malicious websites. Spammers can use this technique to achieve high rankings in result pages for certain key words.
11. Referer spam is a kind of spamdexing (spamming aimed at search engines). The technique involves making repeated web site requests using a fake referer url pointing to a spam-advertised site. Sites that publicize their access logs, including referer statistics, will then end up linking to the spammer's site.
12. Buying expired domains
Some link spammers monitor DNS records for domains that will expire soon, then buy them when they expire and replace the pages with links to their pages.

Reference link: http://en.wikipedia.org/wiki/Spamdexing
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