Googlebot is actually a spider which functions much like your web browser, by sending a request to a web server for a web page, downloading the entire page, then handing it off to Google’s indexer. ...
Google bot is artificial based and auto-programmed software, which collect the database on its website analysis basis and provide respective results at the time of keyword search on google...
Google bot is the search bot software used by Google, which collects documents from the web to build a searchable index for the Google Search engine. Google bots discovers pages by harvesting all of the links on every page it finds. It then follows these links to other web pages.
Googlebot or bots or spiders are created by google in order to crawl the website for indexing in order to check its quality for ranking it in the search engine.
Googlebot is Google's web crawling bot (sometimes also called a "spider"). Crawling is the process by which Googlebot discovers new and updated pages to be added to the Google index.
It should do it automatically if you have an inbound link from another registered site, but sign up for Google Webmaster tools.
Yes it'll ask you for a verify meta tag and you can do lots in there to help your Google page rankings.
It'll scan your site more often etc as well.
Google Bots don't read flash or images so read up on what type of content they are looking for and have proper Headers, Title tags and H1-H6 tags when appropriate.