In fact it may be the first and best thing to do to get traffic to your site quickly. But it's not always as easy it sounds - AdWords has some nuances, and some people have a rough time at first. It's very easy to get ads deactivated by Google almost as soon as you start them.
Once you create a negative history like that with your AdWords campaign, it will be very hard to get Google to 'trust' your ads and you will be in an up-hill battle before you are even able to get your first successful campaign off the ground.
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