Any easy, free and proven way to improve Search Engine Optimization (SEO) is to change the default permalinks that WordPress initially sets in the admin panel.  Permalinks are the URL’s that point to individual pages or posts.  Changing how they are structured presents search engines an easy way to read the URL.

To change the permalink structure in WordPress, simply go to Settings–>Permalinks.

Changing the structure

The default permalink in WordPress is;

http://themetoday.com/?p=123

As you can see there are several options that can be chosen.  I like to stick to the date/category/title based on this article.  You can write it in like this:

/%year%/%category%/%postname%/

this will result in…

http://themetoday.com/2009/category/the-title-of-the-post

As you can see it looks alot cleaner and friendlier than the default URL.

In addition, you can also add these tags if you wish:

%hour% – The hour of the time stamp of your post
%minute% – The minute of the time stamp of your post
%second% – The second of the time stamp of your post
%author% – The author’s name