2-way Google Calendar Sync so you are never double booked
https://www.youtube.com/watch?v=vl-IWYS3gN4&list=PLsw0QRu-ZyMagpCYwEtopXqSsheUTzPK2&index=4
STEP BY STEP TUTORIAL
Click "Allow"
Step 3: Check calendar conflicts
Select calendars which you want Probooking to check for blocking availability