Name Nielsen's 10 Usability Heuristics and give a Salesforce example for two of them.

Nielsen's 10 heuristics:

1. Visibility of system status.
2. Match between system and real world.
3. User control and freedom.
4. Consistency and standards.
5. Error prevention.
6. Recognition rather than recall.
7. Flexibility and efficiency of use.
8. Aesthetic and minimalist design.
9. Help users recognise, diagnose, and recover from errors.
10. Help and documentation. Example — Heuristic 1 (Visibility of system status): Salesforce's Flow progress indicator shows users which step they are on and how many remain — keeping users informed and reducing anxiety during long data-entry wizards. Example — Heuristic 5 (Error prevention): Validation rules in Salesforce prevent incorrect data from being saved with an error message before submission — catching errors at the point of entry rather than later. Designers apply heuristics during expert reviews (heuristic evaluations) as a fast, cost-effective way to identify usability problems without recruiting participants.