Web standards – Web standards are widely accepted guidelines for web page codes; nowadays the most accepted standards are W3C standards; although there is no clear prove that compliance with the W3C web standard is included in search engine algorithms there are quite a lot of SEO experts that believe it is. For more details about W3C compliance or for checking if your site is W3C compliant feel free to visit validator.w3.org.

Web log – The term web log describes a certain type of Web 2.0 site that looks more like an on-line diary, where the owners makes regular (most likely even daily) posts and where the visitors can comment on the owner’s posts. It is also called a blog.

White Hat SEO – White Hat SEO (which is the opposite of the Black Hat SEO) is a generic term for all SEO approaches that respects search engine’s guidelines and policies. White Hat SEO campaigns are not delivering results over night, but the achieved results are solid ones and they are likely to remain for a long period of time.

Wikipedia (www.wikipedia.com) – Wikipedia is nowadays the largest online encyclopedia (with more than 2 million articles) and it keeps growing with each passing day. It was launched in January 2001 as a Web 2.0 application where users are able to write and edit the content. Over time a lot of black hat SEO experts tried to add links to their sites in Encyclopedia articles in order to achieve a back-link from one of the most authoritive web sites on the internet; however these back-links have generally a very short live and they are removed on a constant basis by Wikipedia volunteer editors.