Before creating an ad campaign, it's a good idea to know that Google has a structure. That is, each account can contain from multiple Campaigns, and each campaign can contain one or more AdGroups, and within each Ads group can contain multiple Ads.
Each level has its own settings. The settings at the top level wil affect the levels below it. (Settings at the campaign level wil affect /
appear at the ads group and ads level). But not vice versa.