This script provides insight into elements of the AdWords Quality Score that are not available elsewhere in AdWords. It calculates an account weighted average quality score as well as weighted averages for each campaign and ad group. This can help you select which elements of an account to target for optimization. The account level quality score can also be used to measure the impact of the work you do in an account. You can email the daily quality score calculation to yourself to have a historical record of how your performance has changed.