Webmaster Tools,one of the free tools offered by Google is an extremely useful tool for a webmaster.Once your site is added in webmaster, this tool tracks various factors which helps in improving the status of your site.

Once your site is added, and you click the site name, you will be taken to the dashboard.The dashboard lists all the options available for a site.This includes

• Site Configuration
• Your Site on the web
• Diagnostics

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.

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.

Most people trying to optimize their site to get rankings and traffic find that they succeed fast in the case of Google but have a hard time when it comes to MSN/Live Search.

One basic reason is the difference in ranking algorithms of MSN and Google.From some of the threads posted in the best seo forums related to this topic,here are the major points for better ranking in MSN.

1.Ensure that the domain/website has several backlinks i,e focus on the quantity of backlinks.
2.Change the site contents by making sure that their content is fresh and unique always.

Every year since 2003 (perhaps earlier) Google has gone through a massive changeout process. You can call it an update, an algorithmic change, a recrawl/rebuild process, etc.These Google upheavals usually start in October and their full effects are usually noted by mid- to late-November.If your Google listings have radically altered over the past week or two (or by the end of November 2008) and you require an opinion in it,post the following site details in the forum : highrankings.com/forum/index.php?showtopic=38143:

Age of your site (in years and months)
Size of your site (in page ranges: 1-10, 10-50, 50-100, 100-1000, 1000-10000, 10000-100000, ...)
How many pages you think Google should normally index
How many pages you think Google is currently indexing
Have your rankings changed on Ask, Live, or Yahoo!?
Do you use Google Analytics or some other package?
What approximate percentage change are you seeing in search referrals from Google?
Have your search referrals from other services changed?