Data sources are the connected accounts of your external applications (that are available as integrations on Reportz).
In order to make some great reports, start with adding your preferred data sources from the available pool of added integrations.
You can see all currently available integrations on the Reportz Integrations page .
And more are soon to come. :)
Some sources require you to simply add your login data and connect your account in a few steps. Others require you to add your application token. (more on this subject here)
All added sources on your account can be reviewed and managed in the Sources tab on Account Settings page.