Recently I posted on a forum about a site of mine. It’s brand new & pagerank is n/a. But I mentioned it as PR0. A member was quite precise & he corrected that 
Then I thought I should write a post about the difference between PR 0 & n/a. It may look same but there is a subtle difference between them.
Most of you register & verify your site with Google Webmaster Tools pretty soon as you start a new website. But have you verified your site with the similar service from Yahoo? As a newbie you often miss the point for using Site Explorer. Registering your site with them will allow you to access detailed stats & a few cool tools to optimize your site for Yahoo search. Detailed stats include:
It is a long standing method for webmasters to choose one url version, either www or non-www (for example: http://www.yourdomain.com & http://yourdomain.com) while link building. And there is a strong point to do so. Google gets confused with these two versions of the same url while crawling links. They can treat them as separate references to separate pages even if they point to same page actually. Here lies the danger of duplicate content. Besides it may take long time before Google merges these links. So your total number of backlinks gets reduced leaving you with a less PR score. So choose one version at the start & stick to it all the way to your link building.
I was surfing through the net when I saw some DP members pondering over if Yahoo takes care of nofollow tag in a link. I have seen people getting confused about it in some other places too. So I thought of quoting something official from Yahoo Help to remove the confusion:
When Google started as search engine it used to consider hyphens as blank spaces between the words in file names but not the underscores. This trend went on for several years. As Matt Cutts wrote in his blog in August 2005, Google was still considering only hyphens as the word separators. But situation has changed ever since. In mid 2007 Matt Cutts wrote a post that Google was then looking into the matter of considering underscore as word separator. The matter was not still fully resolved then. But Google’s idea & technology continued to evolve. Now they use a better word parsing method that can find words even if you don’t separate them. But still it is better if you separate them so that Google doesn’t parse it into some unwanted words.
This is just a small trick to get email notification every time Google adds an incoming link to your site. As you know, search term link:www.yourdomain.com returns all the indexed incoming links to your site. So add an alert for this search using Google Alert. Just go there & enter the search term. Select “Type” as “Comprehensive” & “How often” as “as-it-happens”. Now whenever Google index a new incoming link to your site, you will be notified immediately.
While surfing through the net I have found this new released SEO tool that can help you in competitive keyword analysis. And the best thing is that the tool is free. It is called PPC Web Spy. Though you can buy a premium version of it for few extra features, the free version is enough for general purposes.
Here are a few ways to find whether a blog is dofollow or not. First, I would like to tell you a more technical way that you can implement in any computer, whether home or away.
Go to a particular post in a blog with comments. Copy a commentator’s name. Now right click on the page & then click “View Page Source”. Search the source with the copied the name. Now see the right side of it that contains the site link. If you find anything like rel='nofollow' or rel='external nofollow' then it is nofollow. Otherwise, it is dofollow.
Now another easier way to find it out if you are a Firefox user. Just install NoDoFollow addon in Firedox. Now right click on any page & select “NoDoFollow”. Nofollow links will get highlighted with red & dofollow links as blue.