GEO glossary

System Instruction

System Instruction is a higher-priority instruction that guides an AI assistant's behavior.

Why this matters for GEO

Different assistant configurations can affect observed brand visibility.

Related terms

• Prompt
• Inference
• Context Window
• Pretraining
• Large Language Model (LLM)
• Transformer

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• Prompt
• Inference

All 150 GEO and AI visibility terms

Updated November 2026.