Call tracking also allows you to monitor the success of different ads by linking it with your personal Online Reporting Dashboard.
For example, if we create one advertisement for Facebook and one for Google Adwords, we will give each one a different contact number. Both numbers will redirect to your business phone, but each will trigger a different metric on the dashboard.
When you review the dashboard later, you can see how many people called for the Facebook ad and how many for the Google Adwords ad. This gives you the ability to see which mediums are working the best for your business, and adjust your approach accordingly.