When you search a term in Google, you will notice that the term not only appears in the content but is also part of the URL.
Example: If you have a post on SEO Lessons, the URL http://www.greatbloggingtips.com/basic-seo-lessons-part-3-content-body-tag/ will certainly be more meaningful than http://www.greatbloggingtips.com/p03/
Simple URL design rules:
- Make it short, simple but descriptive
- Make it human and machine readable
- No special characters except hyphen “-“
- Do not change your URL once it has been set