Eight Tips Every AdWords Advertiser Should Know
1. Multiple Campaigns
First thing: You want to create multiple campaigns, with each campaign focused around a particular product, category or topic. For example, you could create Campaign A for Product A, Campaign B for Product B, and so forth. But you might also benefit by creating a campaign about Hot New Feature in Product A, in which you would target your keywords, ad text, and landing page to that particular feature, and another campaign about Great User Benefit in Product B, in which you would target that user benefit of product B.