There are two options for this chart - "By Appt Book" and "By Day"
By Appt Book
Each bar on this bar chart represents a single appointment book. Hovering over each bar will display the appointment book name, utilisation rate, and breakdown of available hours vs used (appointment) hours.

By Day
In "By Day" mode, each bar on this bar chart represents a single weekday in the period. Hovering over each bar will display the utilisation rate, and breakdown of available hours vs used (appointment) hours for that particular weekday.

Clinic totals are shown in the text beneath these charts, with amounts shown for:
1) Total Utilisation Rate for the selected date range (eg. This Month)
2) Total Utilisation Rate for the previous date range (eg. Last Month)
3) The Utilisation Rate Goal for the period (optional - if configured in Settings)