Creating and understanding SEO-Friendly URLS Part 1

Clean URLs, RESTful URLs, user-friendly URLs or SEO-friendly URLs are purely structural URLs that do not contain a query string [e.g., 

action=delete&id=91] and instead contain only the path of the resource (after the scheme [e.g., http] and the authority [e.g., example.org]). This is often done for aesthetic, usability, or search engine optimization (SEO) purposes. Other reasons for designing a clean URL structure for a website or web service include ensuring that individual web resources remain under the same URL for years, which makes the World Wide Web a more stable and useful system, and to make them memorable, logical, easy to type, human-centric, and long-lived

Examples of "unclean" versus "clean" URLs follow:

Unclean URL	Clean URL
http://example.com/index.php?page=foo	http://example.com/foo
http://example.com/index.php?page=consulting/marketing	http://example.com/consulting/marketing
http://example.com/products?category=2&pid=25	http://example.com/products/2/25
http://example.com/cgi-bin/feed.cgi?feed=news&frm=rss	http://example.com/news.rss
http://example.com/services/index.jsp?category=legal&id=patents	http://example.com/services/legal/patents
http://example.com/kb/index.php?cat=8&id=41	http://example.com/kb/8/41
http://example.com/index.php?mod=profiles&id=193	http://example.com/profiles/193

What is Slug ?

A slug is the part of a URL which identifies a page using human-readable keywords. It is usually the end part of the URL, which can be interpreted as the name of the resource, similar to the basename in a filename or the title of a page. The name is based on the use of the word slug in the news media to indicate a short name given to an article for internal use. For example, in

http://www.example.com/services/legal/medical-patents

Hope you guys have understood something about SEO Friendly URls

In the next part we will create a slug function to create a  seo friendly URL.