The Health Check is a tool in your Dashboard you can use to analyze your existing Google AdWords campaigns. The purpose of the Health Check is to verify whether your AdWords account was configured correctly and to provide you with an estimate of how well your AdWords campaigns are performing. The evaluation of the performance of your AdWords campaigns is based on 13 parameters. Each individual factor in the Health Check has a maximum score of 100 and that factor is weighted on its importance to give the final Health Check score. The Health Check will not make any changes to your Google AdWords account. It only identifies things that can be optimized to get the most out of your AdWords budget. Please keep in mind that the Health Check is merely an indicative tool and you're not required to follow its recommendations. If you want to take actions based on the results from your Health Check, you need to manually carry out those actions in AdWords.