Validation rules ensure that obvious mistakes and omissions are corrected before submission:
- Fields marked as mandatory must be completed before submission
- Ensure data is in a valid format (e.g. dates in a date field, valid emails in an email field)
- Add more sophisticated validation rules: numbers are within a range, applicants are above a certain age, etc.
- Flexible options: Set validation at page level (user must fix errors before moving to next page) or allow user to browse through form, and fix errors as they wish