First of all, I want to thank all BHW community. I want to start an authority site and use AdSense and affiliate (amazon and others) with it but mainly AdSense. So I’m in Keyword research phase which considered the most important phase in building any site that aim to get organic traffic throughout search engine. OK this is all information I collect for my KW: So I think it’s not so hard to rank what do you think?! Why I think it’s not hard to rank: 1- Almost all first page results in google shows an authority sites with 0% KD so I think there is no that much competition in this KW so google shows these sites 2- Each page that ranks for this KW have low count of backlinks to it 3- There is 20 new pages ranking in top 50 pages 4- KW in Title top 50 >12 and KW in URL top 50 >10 5- The page that ranking 3 make me believe I can do it! Correct me If I’m wrong with all of that it’s my first time doing KW research and I have some question: 1- what Domain Diversity means?? I think it’s means how many different domain ranking for that KW. for example, in my situation the Domain Diversity is 96% in top 50 results there is 2 domains ranking 4 pages each one rank 2 pages. And how it’s affect the difficulty of ranking? 2- How Page Authority and Domain Authority affect the difficulty of ranking and what they are really means? 3- What TF, SF and TR means and how they indicate that this KW is either easy or hard to rank? I notice they are low in the page that ranking 3 in my situation and what’s make them increase or decrease? 4- That DS means? Note: it’s my first thread and my first time doing keyword research. I hope your feedback will help me and others. And sorry for my poor English it’s not my first language.