Most of the online store platforms have pages for measuring and displaying the performance of your store. For example, Bigcommerce has this basic display for statistics and performance on its dashboard.
There is also a separate section called Analytics where you can see in depth details about products, for example, best selling products, abandoned carts report, top visits by origin, purchase funnel, etc.
Bigcommerce has the simplest and most useful dashboard for giving the performance reports of your online store.
Make sure that you set up an account on Google Analytics. Google analytics gives reports that is not given by the inbuilt report and statistics page of your online store.
It is also important use Google webmaster tools: