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You can email reports and dashboards monthly or at another interval.
You can send out a dashboard or a report by email one time only or at regularly scheduled intervals: daily, weekly, monthly, or quarterly.
In many cases, monthly is a suitable interval, especially for managers, executives, and any colleagues who do not need to closely review analytics very frequently but who should stay aware of the Google Analytics tracking data that is available.
In this way, an email report can serve not only to disseminate data, but also to raise consciousness and generate conversations that could lead to further analysis, insight, and action.
Please also see a related post on sharing dashboard configurations with other users.