Search engines see authority web sites as the most important. An authority web site is often web pages that contain their domain name with 'gov' at the end, or huge websites that contain a lot of information and content, such as microsoft.com. Obtaining a link from an authority site or a site with a page rank of over six will make a tremendous impact on your site.
Finding the right keywords is critical to target the site. There are several free, excellent keyword research tools accessible to assist people with this component of their SEO endeavor. Some allow you to compare several keywords and their popularity quickly and effortlessly.