Cartum uses Google Analytics data to measure website traffic. In order for your Visitors and Conversions reports to work properly, connect your Google Analytics account to the website.
How to connect Google Analytics account to your website reports
Go to Settings → General settings → Info about store in the control panel.
Locate Analytics: GA4 resource identifier field and click Select a resource button next to it.
Select the account you want to use for your store analytics and enable data access.
Select the property used on your website.
Click Download to populate the reports with the previously obtained data for or Continue without download to start measuring your website traffic from the current day.