1. domain: A good domain name is easy to remember. Make it as short as possible, preferably one or two words.
2. domain extension: .com is the most popular
The shorter URLs and easy to spell are much considered for ranking a website through SEO techniques. The URL must relate with the niche of the website so that it can be easy for the people to find it in Google search engine quickly. The shorter the URL of your website the more it can help the people to memorize it quickly and to recall it at the time of hunting.
The SEO friendly url is that one which is short and easy to remember, it should be connected to your niche. So that it can be easy to memorise and can be searched easily by the visitors in search engine.
1. Consolidate your www and the non-www domain versions
2. Avoid dynamic and relative URLs
3. Create an XML Sitemap
4. Close off irrelevant pages with robots.txt
5. Specify canonical URLs using a special tag