Twilio Programmable Voice` combines with `Google Analytics` to create an easy call tracking system. The system allows users to track the impact of marketing efforts on lead generation and sales by capturing call tracking metrics in Google Analytics. The system is designed to tie a phone number to a campaign, forward calls to the actual phone number, map the country code of the caller to a geo-location, and report to Google Analytics using the tracking ID of the account created. The results can be viewed in the Google Analytics account, including the location of the caller, accumulated results of call tracking, and impact of marketing efforts on lead generation and sales.