The Google "sponsored" search results that appear on the far right of the search results are paid Adwords advertisements, using the Pay Per Click option, one only pays for actual visitors who were searching for very specific terms. Web site hosting accounts commonly come with a $50 voucher to help you get started with Adwords. Their self serve ad management system allows you create advertising campaigns with any budget, some spend $10 a day, some spend over $10,000 a day.
Why dont you use Google search ??? you will find the answers to all your questions,trust me its simple to use !!
yes i agree with whatnow292, for any particular key word ad words is better than Google search because it gives valuable knowledge for your business.
Google AdWords is a service that lets you create and run ads for your business, quickly and simply. Run your ads on Google and our advertising network -- no matter what your budget, you'll only pay when people click your ads.