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If im not mistaken google do group certain keywords into an ad group right? So i assume if you rank that one certain keyword on that group it also does for other keywords in the group? correct me if im wrong

If you add a host name with your registrar the site then becomes available for everyone in the world. Even with a login you could have some leakage. If your site is set up to only answer to http://test.sitename.com and the only place you put the translation for that is in your local host file there is no opportunity for leakage. You don't have to worry about trying to block access other ways.

does moz cawel test tool is sufficient enough to crawl a whole site ?

is there anyway we can do it for free? assuming i own a wordpress site, do contact form able to do so? because all i want is to run one campaign but these services required montlhy subscription

may i know how does this have any relation with wordpress?