When it comes to prompting, different tools have different methods. For example, Midjourney has the most complex and detailed prompting.

Sample prompt
"Tiny and cute mouse character sitting on table in the medieval tavern, detailed and soft look, dynamic pose, closeup, portrait, octane rendering, medieval tavern background, ultra detail, intricate details, volumetric lighting, photo realistic, lifelike, photography, digital art, 8k"

You can learn more in their quick start guide.

Most prompts for image generators include:

• Medium  (photo or cartoon or drawing, etc)

• Subject (a cute mouse)

• Action (sitting on table) 

• Setting (in a medieval tavern)

• Style (digital art, volumetric lighting, etc.)