With traditional advertising and most forms of online advertising, ads are simply broadcasted to a wide range of audiences. Google AdWords ads, however, are targeted to people's specific interests.
When a user enters a search query on Google, they'll see the natural search results for that query, along with AdWords ads that are highly targeted to the search topic. Thus, AdWords ads are as relevant and useful as Google's search results. Your ads will reach users at the precise moment when they're looking for your product or service.
You can see detailed report directly on Google's website of your account, your marketing investment, how many clicks you got every day.
_______________________________