You can choose from over 200 dimensions and metrics.
Most of the dimensions and metrics you already know from Matomo (Piwik) are supported and even some new metrics are supported that aren’t available yet in the standard Matomo reports.
You will find a list of supported metrics and dimensions in the Glossary. Please note that the complete list of dimensions is not listed in the glossary, but the list of “Reports” is quite similar to what dimensions are available to use in Custom Reports.
Do you miss any dimension or metric? Just let us know, in most cases we will be able to add support for them.