The basic statistics can be found in admin - Setting - Statistics. These data are just basic and you can't get any details about your customers' behaviour from them.
For more advanced statistics we recommend you Google Analytics tool which can help you understand the performance of your e-shop better. With this tool you can evaluate the ad campaign affectivity, find out the sources of the conversions and the most searched keywords.
Google Analytics is free of charge and its interconnection with our platform is also free.
In admin - Settings - Modules you can request to enable Google Analytics.
In admin - Settings - Interconnection fill in the key you obtained in Google Analytics.
Google provides also educative tutorials how to set everything up and which factors are important to follow. You can find the tutorials here: Google Analytics Academy
Zboží, Heureka, Google Ads, Seznam Sklik and other marketing channels provide only distorted data because they try to pretend that 100% value of the order was made through this channel. For better understanding of these channels we recommend you to learn what attribution model is and what it means to analytics. You can start with the Google Help Page: About attribution models