Let's first consider search engine optimization for a bit. There are only about three things we know about optimizing for the search engines. The first, and most obvious thing to consider is what's on the page and there are only a few things that are of consequence there. The second is the strength of the links coming into the page, also known as Page Rank (PR). But with the last Google update, it's questionable how much difference PR really makes. Lastly, and often overlooked, is what all the links coming into the page say about the page.

Now, I haven't really told you anything new yet if you're acquainted with Search Engine Optimization. But it would do us well for our links to say something relavant to our page if what a links says about our page impacts our PR. And, wouldn't it make sense to mix things up a bit as you linked to the page?

And there's the complication. With DotNetNuke's LOGO control, you have an image that links back to the home page that either says nothing about the page or, if you believe the alt attribute has meaning, says exactly the same thing about the page. Personally, I would like to have a little more management control of my links. So, I added the rel="nofollow" attribute/value pair to the hyperlink control that surrounds the logo image in the Logo.ascx file which is located in /admin/skins. Now each page on my site can specify exactly what the link should say about my homepage.