Permalinks are the permanent URL’s to your individual blog posts and pages, as well as categories and other lists of blog postings. A permalink is basically your blog post URL or address. A permalink is what another blogger user will use to refer to your blog article, or how you might send a link to your blog story in an e-mail.
To setup your Permalink pattern in your WordPress blog, click on Settings in the menu and choose Permalinks option.
As URL’s are frequently visible to the people who click them, they should therefore be crafted in such a way that they make sense, and not be filled with incomprehensible parameters. For example, take a look at the default Permalink stracture in your WordPress blog’s Permalinks settings:
http://www.example.com/?p=111
How is your blog user to know what “p” represents? And where did the number 111 come from?
In contrast, here is a well-structured, Pretty Permalink which could link to the same blog article, once the installation is configured to modify permalinks:
http://www.example.com/2011/04/14/sample-post/
Your blog user can easily guess that the Permalink includes the date of the blog posting, and the blog post title, just by looking at the blog URL.
Make sure your permalinks are “pretty” before you start creating posts on your blog. Login to your WordPress blog, click on Settings in the menu and choose Permalinks option.