The email report is completely configurable by the user. You can easily select the dashboards that needs to be included in the report along with the exact hour of the week when the report will go out. The email subject and body are customizable too. Follow the below steps to configure a report for yourself:
If there is no data for a widget for a particular week, it won't be present in the email report. A widget only shows up in email report if there is some data for the last week.
There are 2 kinds of filters on the dashboard:
Segment Level Widgets