A11ying with Sanna - Web Content Accessibility Guidelines a guide to the accessibility requirements
3 Understandable

3.3.2 Labels or Instructions

Conformance level: A
Criterion released in WCAG version: 2.0

Official description of the success criterion

Labels or instructions are provided when content requires user input.

What to do?

Provide labels or instructions when content requires user input.

Why is it important?

Ensures users understand what is required.

More about this criterion elsewhere