Conditional logic
Show or hide questions based on previous answers.
Conditional logic (Business plan) lets you show or hide a question based on how a respondent answered an earlier one — useful for skipping irrelevant questions or drilling into detail only when it applies. You'll need at least two questions on the form before you can create a rule.
Building a rule
From the builder's Logic tab, click Add rule and set four things: the action (Show or Hide), the question it affects, the source question to check, and the condition (e.g. "is", "contains", "is greater than", "is answered") along with a comparison value where relevant. The operators available adjust automatically based on the source question's type — text questions get a different set than select or number questions.

A rule that shows one question based on another's answer.
Show rules vs. hide rules
Show rules keep a question hidden by default and reveal it once the condition is met. Hide rules keep a question visible by default and hide it once the condition is met. You can stack multiple rules across a form; each one is evaluated independently.