What information can I give users about Lookout before it is rolled out?

There is a Welcome to Lookout PDF [657KB] available in the Lookout resources section in Vodafone Business Marketplace. This one page document provides an introduction to Lookout, what it does, and user privacy terms.  
Can I block users from accessing URLs when a threat is reported?
Access the Protections tab in the Lookout admin console and select the On Device Threat Remediation tab at the top of the screen. 
From here you can add, block and save a domain. Any enrolled users will then be blocked from accessing the URL.