The use of Matomo (ex Piwik) statistics requires configuration and site parameters.
Go to the application's configuration interface and the "Web statistics" category to set upurl on the Matomo server.
To retrieve data from Matomo and display it on the site, an authentication key is required.
In the settings area for each site, in the "Matomo" section, enter the Matomo identifier for the site.
If you wish to display Matomo statistics (number of views), check the "Display statistics" box and enter the necessary parameters to retrieve the statistics.
If you don't want to use Matomo for a site, simply leave the Matomo ID blank and leave the "Show statistics" box unchecked.