For most types of advertising, you pay for people to see your ad. With Google Adwords advertising you only pay when they click to visit your website. So you get exactly what you pay for - more customers. And because this is pay-as-you-go advertising, you have complete control.
Control how much you spend
You can set a daily spending limit and an amount you're happy to pay for people to click on your ad.
Control who sees your ad
Your ad will only appear when potential customers are searching online for relevant terms you've chosen to describe your business.
Target your customer audience