Picture this. Your boss calls the customer testing your new portal and nothing works. They can't see anything. Then it hits you: it worked fine because you're an admin. You never tested it as a regular user. Yeah. Let's make sure this doesn't happen to you. In this video, I walk you through how security actually works in ServiceNow so you can build apps people can use and keep sensitive data protected. Here's what you'll learn: How ACLs control access at the table level and field level The three-part evaluation inside every ACL check: roles, conditions, and scripts Why those checks run in that specific order (performance matters) How application scopes create security boundaries between apps What cross-scope privileges are and how they get packaged with your app Why testing from every role and persona is non-negotiable The sneaky way queries and reports can expose data even when read access is locked down This is the fifth episode in a series designed to help you go from zero to building confidently on ServiceNow. Test your security and let's keep building!