Sometimes when delivering a project to our clients, we worry about how they will interact with the dashboard. Will they be able to use all the implemented functionalities properly? If we could show them exactly how to use each of these functionalities, we could improve their experience. However, coaching end-users on how to use the application could be very time-consuming.
https://www.clearpeaks.com/power-bi-best-practices-help-tooltip-using-animated-gif/
You can create visually rich report tooltips that appear when you hover over visuals, based on report pages you create in Power BI Desktop and the Power BI service. By creating a report page that serves as your tooltip, your custom tooltips can include visuals, images, and any other collection of items you create in the report page.
https://docs.microsoft.com/en-us/power-bi/create-reports/desktop-tooltips?tabs=powerbi-desktop
The public preview of modern visual tooltips includes data point drill actions and updated styling to match your report theme.