Matt Cutts has indicated that a new Google Toolbar PageRank update is on its way. Don't forget this wont increase the PR value of your web directory or website. PR is constantly changing. Google update the toolbar value every three months or so, and the next update is now.

Google

Google is the biggest and most widely used internet search engine. Most search engine optimization is optimized for Google, as Google will generally bring the most search engine traffic.

Yahoo

Yahoo is a portal as well as a search engine.

MSN

MSN is also a portal and search engine.

Google is the most popular search engine on the internet. If you wish to generate visitors to your website using search engines, Google is the search engine to concentrate on. All of the techniques used to optimize a website for the Google search engine also apply to other search engines, such as MSN and Yahoo. If you follow these Google optimization techniques you can improve your websites position in Google searches, and therefore generate more visitors to your website.

Google's guidelines explained

Following Google's Webmaster guidelines will increase your position in search engine results. This article expands those guidelines.

The Google 'sandbox' is a term used to describe a set of filters Google applies to websites to limit the websites inclusion in search engine search results. Websites typically only fall into the sandbox within the websites first year. Websites normally fall into the sandbox because the domain name uses competitive keywords, or the website gains high levels of inbound links unnaturally quickly.

Google applies these filters to a given website to reduce or exclude the websites inclusion in certain search engines results. This is done to prevent potential spam websites from appearing in search engines results. Only long-term and high quality websites are therefore generally seen in search engine results.

Google's PageRank is a link analysis algorithm that scores each webpage in the Google search engine index database. The PageRank value assigned to each webpage is complicated, and generally only known to Google. However, the Google Toolbar, which integrates into popular web browsers, shows a guide PageRank value. These Google Toolbar values range from 0 to 10.

PageRank 'links at votes'

Google describes PageRank:

“ PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page's value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves "important" weigh more heavily and help to make other pages "important". "

DMOZ is not showing in Google's search results for the term "DMOZ". The recent algorithm changes at Google have affected even the biggest of web directories.