Search engines have extremely large indexes which hold a copy of all of the webpages they have crawled and chosen to add to their index. The search engine spider crawls through the web, following links, and when it finds a page to add, it will make a copy of it, and add it to its index. When this has happened to your site, you can consider it as having been "indexed". To check your site indexing go to the Google and in the search box type site: yoursite.com. This will give you a list of your website pages that are in the index. If there are no results, the indexing has not happened yet. You can also do this same search at MSN and Yahoo.