Where to find data
Locate your data and learn what's working and what needs work. How many visitors your website has, where they come from (is your Yellow Pages advertising working?) and more.
Google Analytics report how many visitors your website had, where they came from and you can set-up conversion tracking to find out which traffic sources deliver the best outcomes.
Facebook insights provide data on post views and the demographics of your audience in Facebook.
There may be data available already even if you don't have analytics on your website. Most website hosting services have server statistics available for a number of months.