What are Nilsen heuristics?

Nielsen's heuristics are a set of 10 usability principles developed by Jakob Nielsen to evaluate interface usability and improve user experience. They help identify design problems and create more understandable and efficient interfaces.

The main heuristics include:

1. Visibility of system status — the user should always know what is happening.
2. Match between system and the real world — use understandable terms and logic.
3. User control and freedom — ability to undo or redo actions.
4. Consistency and standards — uniformity in the interface.
5. Error prevention — minimize the possibility of errors.
6. Recognition rather than recall — facilitate information search.
7. Flexibility and efficiency of use — support different user levels.
8. Aesthetic and minimalist design — avoid unnecessary information.
9. Help users recognize, diagnose, and recover from errors — clear error messages.
10. Help and documentation — accessible assistance when needed.

These heuristics are widely used in usability audits and interface design.