The logging 'Digest' is a summary view of selected statistics based on web server logs showing amongst other things the origins of sales, and page views
The Digest date range can be selected from a few preset ones as per below

And looks a bit like this in format – obviously the values will vary significantly from one organisation to another and for longer periods of time, such as a week or a month

If you want to know what proportion of your web sales are Print-at-Home, there is a handy statistic on the Digest Log file

Percentage of Web Sales that were
Print-at-Home

The Twitter and Facebook stats are based on how many web sales were Tweeted or Posted to a Facebook wall after purchase, and how many of those resulted in redirected sales.

Typical User Errors would look similar to this:

System errors are emailed to our Web Development Team.

A monthly view could look like this: