Do domain extensions like .com vs. .org vs. biz matter for SEO?
Q: can your domain name make a big difference in ranking with very competitive keywords, ex. using a .us compared to a .com?
Q: are the reviews relevant for ranking in Google?
Q: when changes are made to a website, how
Yes, domains matter. .com, .org, and .net do seem to be preferred over .biz, .info, etc., so generally try to use the more common ones. Even more important, having a keyword in the domain is a big help to SEO performance (if you can get one!).
REVIEWS. These are HUGE if you are trying to show up on local search AND if Google is generating Google Places results. Google Places / localization for SEO is a function of keywords in the right places AND reviews.
Third, in terms of how long, it depends how you have trained Google. Google is reputational; some sites it picks up very fast, as those sites 'train' Google that they have good, frequent contents. One way to do this is to build links. Another is to generate social mentions. I teach this in the classes of course. What people don't usually get is Google does not treat all sites the same; it pulls CNN by the minute, it might pull an average small business site every six months. You have to 'train' Google. It's like a puppy.
Hope this helps!
- Jason McDonald - email@example.com