In order to find the right candidate you may need to interview hundreds of applicants to find the perfect fit for the job. Well, the keyword research process is very similar; you have to cast a wide net first to capture all the possible combinations of keywords known to man. Even then, it’s almost guaranteed you will discover new keywords you have missed in the original research only a few weeks earlier. What this tells us is the keyword selection and refinement process never ends, or at least it should not end until you are happy with the number of visitors you are receiving to your site.
Learn more at http://www.mizwar.com/how-to-begin-keyword-research/