Google AdWords Conversion Tracking works within your Google AdWords account to let you see exactly which keyword from a specific ad group in a campaign resulted in a sale. Based on the number of sales and cost of clicks for a particular keyword, it will tell you what the cost per conversion is for that particular keyword. The data gathered through Google AdWords Conversion Tracking will help you to run a more effective Google AdWords campaign. (Please note: Google AdWords Conversion Tracking will not work on PPC accounts with Yahoo, MSN, or any other search network).
Google Analytics tracks traffic from all online sources, and provides even more robust data. This includes: reporting on pageviews, time on site, bounce rate, visitor demographics, visitor loyalty, referring sources, mobile use, ecommerce sales figures and much more. The data presented in Google Analytics will provide you with the critical information needed to help you position and manage your business more effectively.