Monitor mode allows all the traffic, you can view detailed reports of bot activity on your website but it does not allow you to take action against bots. Active mode allows you to take action against bots.
Follow the below mentioned steps to move from Monitor mode to Active mode.
Login to ShieldSquare portal
Go to Environment Settings page and open your production environment
Change the 'Mode' value from 'Monitor' to 'Active'
Under Configuration->Bot Management, toggle the switch from Monitor to Active
Set the appropriate response (Allow/CAPTCHA/Block/Feed Fake Data) for the different types of bot traffic
If required, you can customize the brand on the CAPTHCA or Block page as per your business need from this feature
Note: Implementing Feed Fake Data completely depends on your business logic.