The Components of a Google AdWords Campaign
A campaign is part of the Google AdWords account that has its own budget, location and language targeting and network targeting preferences. Google AdWords campaigns can also have one or more ad groups, with each one containing at least one ad to go with keywords or related placements.

With location and language targeting, you will decide where you want your ads to show up and in which languages.
The budget is up to you. It should be the amount you’re willing to spend on Google AdWords advertising each day. Once the account is up and running, you can adjust your budget at any time.
Through network targeting, you can have your ads on Google search, search partner sites and the Google Content Network. On the Content Network, you can choose between running your ads on specific and relevant pages across the entire network or only have them on relevant pages just on the placements you’re managing.