Google's mission is to organize the world's information and make it universally accessible and useful.
Google's utility and ease of use have made it one of the world's best known brands almost entirely through word of mouth from satisfied users. As a business, Google generates revenue by providing advertisers with the opportunity to deliver measurable, cost-effective online advertising that is relevant to the information displayed on any given page. This makes the advertising useful to you as well as to the advertiser placing it. They believe the consumers should know when someone has paid to put a message in front of them, so they always distinguish ads from the search results or other content on a page. They don't sell placement in the search results themselves, or allow people to pay for a higher ranking there.
Below are some of the Google Products
Gmail - Email with lots of storage, search tools, and integrated chat.
Google Calendar - Everyone can organize their schedules and share events, meetings and entire calendars with others.
Google Docs - Create, share, and collaborate on documents in real-time.
Google Sites - One-stop sharing for team information.
Google Apps - A suite that comprises all of the above mentioned products that is useful to companies and institutes of learning.