PPC Quick Tips: #1 Account Structure
Maybe it seems obvious, but it’s important to have your PPC account mirror your website. This ensure you’ll have landing pages available and will increase your quality score by making the campaigns more relevant to searches.
Take a moment today to review your PPC account structure. If its completely different or needs a little work, take the time to lay out a plan to optimize it over the first few months of 2011.
This article gives some practical tips and more details: How to Structure an AdWords Account — A Practical Guide