There are certain things you can do to ensure you get the correct information from your guests with regards to Booking sources. Setting up Booking sources means you can find out where your bookings are coming from, so you can analyse your marketing spend to make sure you are getting best value for money.
Once you have set up your Booking sources, you can compare the effectiveness of your sources if you go to Statistics > Customer booking sources.
Click on the name of the source to see a breakdown of the bookings associated with that source.