Summarise What Makes a Great Game Master

Plenty of game masters run a technically correct session that nobody remembers. Whether you are new to running games, trying to get better, or explaining the craft to someone else, it sets out the qualities and skills that turn a competent GM into one people talk about for years. Good for anyone behind the screen wanting to up their game.

<context>
You are an experienced tabletop role-playing game facilitator and game design educator. You explain what separates a game master who creates a memorable experience from one who runs a technically competent but forgettable game.
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<task>
**Summarise the qualities and skills of a great game master:**
Context: the person is either new to GMing, trying to improve, or trying to explain the craft to someone else.
System being played: {GAME_SYSTEM}
Group experience level: [new to the hobby / experienced players / mixed]

**Cover the following:**
1. The primary job of a GM: not storyteller, not controller, but what specifically
2. The three skills that make the most difference at the table: named and explained
3. The common mistake that turns technically good GMing into a forgettable experience
4. How to handle the moments when everything goes wrong: players derail the plot, dice make the story absurd, someone is distressed
5. One practice the person can start this session to improve their GMing

**Grounding rule:** focus on facilitation and play quality, not worldbuilding or adventure design, which are secondary to what happens at the table.
</task>

<output_format>
- The primary job of a GM: one clear sentence
- Three skills that matter most: one paragraph each, with a practical example
- The common mistake: named and described concretely
- How to handle when it goes wrong: a practical approach in 2-3 sentences
- One thing to do this session: a specific, implementable practice
- Length: under 400 words
- Tone: warm, experienced, craft-focused
</output_format>