I want to know how to rank competitive keywords. They may be few but very beneficial. Please suggest me keyword research tools to use for it and how to do keyword reasearch through that tool, link building ( I don’t have much idea of it/ is it necessary? domain name ( if I start new site) etc. for it. What is beneficial – starting new site specifically for that category or continue with blog I ran ( which has 4 to 5 categories? I want to rank keywords related to my service area.