Black Hat SEO, like the White Hat SEO, also involves several techniques that would likely violate those of search engines' guidelines. Although most of content spamming techniques of Black Hat SEO have been widely ineffective, other forms of Black Hat SEO techniques are now widely used to compensate for this loss. One particular technique used is link spamming through the use of world-writable pages. Web sites that can be edited by users, such as Wikis, blogs that allow comments to be posted, etc., can be used to insert links to spam sites if the appropriate anti-spam measures are not taken. Techniques involved in this method include:
Blog Spamming
This method of spamdexing or Black Hat SEO is done by automatically posting random comments or promoting commercial services to blogs, wikis, guestbooks, or other publicly accessible online discussion boards through using different spamming softwares. According to
SEO Philippines consultants, adding links that point to the spammer's web site artificially increases the site's search engine ranking. An increased ranking often results in the spammer's commercial site being listed ahead of other sites for certain searches, increasing the number of potential visitors and paying customers.
Comment Spamming
Similar to blog spamming, comment spamming is a form of link spam that has arisen in web pages that allow dynamic user editing such as wikis, blogs, and guestbooks. It can be problematic because agents can be written that automatically randomly select a user edited web page, such as a Wikipedia article, and add spamming links.
Wiki Spam
Using the open editability of wiki systems to place links from the wiki site to the spam site. The subject of the spam site is often unrelated to the wiki page where the link is added. In early 2005, Wikipedia implemented a default "nofollow" value for the "rel" HTML attribute. According to
SEO Philippines consultants, links with this attribute are ignored by Google's PageRank algorithm. Forum and Wiki admins can use these to discourage Wiki spam.
Referrer Spam
This technique involves making repeated web site requests using a fake referrer url that points to the site the spammer wishes to advertise. Sites that publicize their access logs, including referrer statistics, will then end up linking to the spammer's site, which will in turn be indexed by the search engines as they crawl the access logs. According to
SEO Philippines consultants, this benefits the spammer because of the free link, and also gives the spammer's site improved search engine placement due to link-counting algorithms that search engines use.
