You can now suppress tooltip bubbles on number widgets when a custom message isn't provided. This change allows for a more streamlined visual presentation, displaying tooltips only when they contain relevant information.
Where: This change applies to CRM Analytics in Lightning Experience and Salesforce Classic. CRM Analytics is available in Developer Edition and for an extra cost in Enterprise, Performance, and Unlimited editions.
How: Enter edit mode for your dashboard, and select the number widget. Go to the Widget tab, expand the Tooltip section, and deselect Show Title Tooltip.