# Permissions

NPC's are one of the core building blocks to making awesome quests. By permission-gating certain information or abilities, you can set up scenarios where users have to solve puzzles or collect items in order to continue on to the next step!

In the Dialogue flow chart, click on **Message** and chose **Check Permissions**. Here, you can select what type of permissions you would like to apply to your dialogue.

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You can create special groups in your address book, or gate responses based on items held, exprience points or levels.&#x20;