A site ID is our unique identifier for you. This tells us exactly what licence you're using. You can provide this when submitting a customer support query and this allows us to quickly and efficiently help with your query.
How to find your Site ID
Right click your Little Green Button, and select About.
Right click your Little Green Button, select Licencing then View/Amend details.
Your Site ID will be shown on the top right of the web page that opens.