Best Practice 3.6 – Provide error suggestion (Baseline level)

When a user makes an input error, always provide the user with a suggestion to fix the error if ever possible.

Before Rectification The example above shows an error message that is not helpful enough because it does not provide an adequate description of what needs to be corrected.

After Rectification In contrast, this example shows a message that provides a good explanation of what needs to be corrected.

W3C WCAG Reference: 3.3.3 Error Suggestion