Negative Prompt
A second prompt listing what you do NOT want in the image — the model actively steers away from it. Classic entries: blurry, extra fingers, watermark, text, low quality, deformed hands. Negative prompts shine when a concept keeps sneaking in: generating a forest that keeps including people? Add people and humans to the negative. Not all models expose it (some, like Imagen 3, prefer everything in the main prompt), but where available it is a precision scalpel. Tip: keep it short and targeted — ten focused words beat fifty generic ones.