Start at G Suite Marketplace. You need to be logged in as Superadmin to be able to install the app.
If you successfully get there, click the Install below the app name.
Now please click Continue to follow with the app installation.
The pop-up window with detailed scopes will open. After you read them, please tick the field next to “I agree to the application’s Terms of Service…” and then click Accept.
The next window gives you information where can you access the app in G Suite. Click Next again.
The third window asks you to complete additional setup - you will get to that point later, now press Done!
You will now notice that the button in the top right corner changed to Launch. Please click this button to enter the app.
You are in the app now, hooray!
To access the app again without going to Marketplace just go to https://signaturesatori.com/, click “LOG IN” and if asked, choose the account that has admin rights for SignatureSatori. Or you can always use the Google grid menu.