You can share reports and widgets that you have created with your colleagues who also have access to Insights.
How to share a widget with another user
On the widget, click the three dots in the top right corner. Click Edit widget:
Click the Share button and add the users you want to share the widget with. Then click Save:
How to share a report with another user
Open the report you want to share with your colleagues. Press the three dots in the top right corner. Click "Edit Report":
Click the share button and choose the people to share the report with. Click Save:
The user will then receive a notification about the shared report/widget when logged in: