For Display campaigns, there is an option to let AdWords automatically find new customers. This allows Google to find new users that are similar to those in your targeting criteria. This also means that the advertiser has less control over where the ads serve and to whom they serve because Google takes over to find new customers. An advertiser also has the option to allow Google to find new customers conservatively or aggressively. Expect to see more impressions (and likely more clicks) if you choose the aggressive option.
Want the skinny on how you can drive traffic to your website? The following traffic-driving strategies are organic in nature. You won't have to pay a single dollar for traffic that falls under this bucket. But you will have to trade your time. And since time is more valuable than money, in that it can only be used once then it's gone forever, there's still a significant cost involved depending on your skill level.
Webtrafficgeeks.org turned out to be outstanding in this area of business. Real people with obviously a passion for what they are doing. Beside that they run a professional business. Customer support is above industry standard from our experience. Last but not least the quality of the traffic matches that picture. Real visitors who are exploring your sites, low bounce rates and a solid conversion rate in our cases speak for themselves.