Permalink is the structure of the URL of a website or blog page. Permalink is very important issue for SEO and Search engines to crawl it properly.

The people who use Wordpress in their blogs; they generally have ugly default wordpress permalink which is like http://example.com/cat=p?. Actually this kind of permalink is not suitable for crawling and search engine optimization. If you keep intact your default WP permalink; then you are fault by default.

Shouldn't we make your permalink in such way so that search engines find the keyword in permalink to take us in higher ranking in SERPs (search engine result page)?

Now, the question raised - how to change the wp default permalink?

Well, to change the default wp permalink there are some options you can opt. Personally I recommend you to take the "Custom Structure" options and customize it.

To do it ---
1. Just go to your Settings option from the WP dashboard. Now find "Permalink" option and click on it.
2. Permalink settings page will be opened.
3. From the common settings menu; choose the Custom Structure radio button.
4. Now type /%postname%/ on the Custom Structure box and save this changes.

Now your default wp permalink will be changed from www.example.com/cat=6? to http://www.example.com/keyword-which...od-for-seo.php

Hope; you will easily be able to do it. Best luck.