With all of the important information pertaining to a web site’s appearance, or lack of appearance, already organized and available, I am presenting a link to Google’s Web Masters page.
Answers to many of the questions you may have, along with some other interesting items can be found there.
More direct links are:
1) My site’s ranking in Google search results
3) Will participation in AdWords or AdSense affect my listing in Google’s free search results?