Monitoring your AdWords account performance allows you to make informed optimization decisions and is an important part of managing a successful account. AdWords provides many easy-to-use free tools that Grantees should take advantage of on a regular basis. Google Grants blog posted a few tips on tracking your account performance, check them embedded below:
Use Google Analytics that can help you identify how people found your site, how they explored it and how you can enhance visitor experience.
More Info: AdWords Optimization Center