1-Optimization -A page is said to be optimized when its has been structured is such a way that its ranks well for those terms its target, it’s a fairly subjective concepts, what some see as optimization might be termed spamdexing by others

2-Page Jacking -The Act of duplicating a web page & presenting the duplicate as the original.This kind of theft is uncommon.

3-Mirror Sites -Referring to sites that offer authorized of content also found on other sites .The initial motivation was to ease bandwidth load and increase availability by distributing popular files to many servers.

4-Doorway Pages(Bridge page) -A doorway pages is a web pages full of keyword – rich copy that doesn’t deliver any useful information on it , other than a link into the site, and whose sole purpose is to be the search engines .

5-Multiway Linking-It’s a technique used for website promotion where by websites may create similar one way link that each involve 3 or more partner sites

6-Index-The collection of information a search engines has that searches can query against, with crawler based search engine , the index is typically copies of all the web pages they have found from crawling the web , with human powered directories the index contains the summaries all web sites they have been categorized

7-Google Dex -Google dex is the score given to a term based on the no of pages that Google has indexed and posted as results for that term

8-Link popularity -A raw count of how popular a page is based on the no of back links/inbound links it has .Its doesn’t factor in link context or links quality, which are also important elements in how search engines make use of links to impact rankings

9-Dead-link -A link to a page that no longer exits or has been moved to a different URL – Search Engine spiders regularly respiders pages in its index and removes dead links

10-Deep-Linking-The practice of linking to the inner pages of another web-site as opposed to linking to the homepages.