Hi, this is from the ATV web site:
''3days pass
This ticket enables to travel for three days, starting from validation, on urban and extraurban bus lines of Verona and the suburban area.
Furthermore the ticket includes:
> bus service Arena di Verona Lake Garda
>shuttle bus Spiazzi-Madonna della Corona
>shuttle bus Catullo airport-train station Verona Porta Nuova
>service BusWalk&Bike
Price: € 20,00''
As far as I am aware, it can only be used on the eastern shore of the lake (the part in Veneto) as it's a different bus company - Arriva - on the western shore (Lombardy).
All details of the bus tickets:
https://www.atv.verona.it/flex/cm/pages/ServeBLOB.php/L/EN/IDPagina/575