The charts on your Dashboard page are showing the analytics collected from your account. On the left hand side, you'll see a Lead Conversion chart. This measures all attempts and drafts that are made, compared to how many bookings are complete! The middle chart shows you how many new vs. returning customers have booked your services. The final chart on the right displays your booking methods. It compares how many bookings have been made online through your customer facing booking page, versus how many bookings have been made by telephone through your companies admin.
You'll see above these charts there are custom date, region, and service tabs that you can adjust, which will change the parameters of these analytics! The power of seeing these analytics for your business will help determine which things are working tremendously, vs. where you can focus more on improving for better results.