Page Rank , popularly known as PR in the SEO field is one of the most important factors to be considered while performing SEO optimization. Google ensures that this update take place once every 3 to 4 months.

Page rank is basically an important algorithm calculated by the Search Engine Giant Google ,and assigns a numerical value to each of the pages of an website. The numerical value is between 0 to 10,with the value 10 representing the maximum weight age. It can be seen in the Page Rank attribute of Google Toolbar. The previous update was held on December 31st 2008.The latest update of the page rank has taken place on April 2nd.

Keywords-a very important part of SEO.Choosing the right keywords is a crucial aspect of SEO to get your site optimized.In case we focus less while choosing the keywords, we may not get the desired traffic
to our site.Also ensure that while selecting the keywords of a site,check its competition and popularity using the popular and free Google Adwords Keywords tool.Here is a scenario where the SERP(Search Engine Result Page) for the keywords is good but the site does not have sufficient traffic.Read through this posting forums.webconfs.com/t2651-good-serp-but-no-traffic-.html

Keyword Density is one of the important On Page SEO factors.It is a value measured in percentage i.e the number of times a keyword displays on a page to the total number of words that appear in a page.For SEO, keyword density is used in order to determine if a web page is relevant to a particular keyword.
However though there are other factors which search engines concentrate on to determine relevancy,keyword density also needs to be given its due importance while performing On Page SEO.

These days most people who own a website look forward to optimize their site through SEO.The field of SEO has risen to utmost importance for the past few years and is also predicted to improve further greatly in the forthcoming years.Due to this, there are several companies emerging in the field of SEO. Choosing the right SEO company can be a very tedious task for webmasters.

The postings and the threads in the following link can provide good guidelines for choosing the right SEO company.

A new comer in the field of SEO might find certain terms to be like Greek and Latin to them.It would
really help them to have a basic idea of some of the following most common terms which are used in SEO.

Algorithm
The secret formula that a Search Engine utilises to determine which web pages it will rank for any particular keyword search as well as the the order in which those pages will appear in the SERPs.

Spider
Programs written to scan the web automatically for several reasons (to index web pages, for spamming