Glossary
Single-page vs multi-page form
One scrolling page versus sequential steps — a layout trade-off.
A single-page form puts every question on one scrolling screen; a multi-page form splits them into sequential steps with Next/Back. The choice is mostly about perceived effort and where you can capture data, not about which is universally better.
Single-page wins for short forms (contact, signup) where the whole thing is visible in one or two screens — there is no navigation overhead and motivated users can fly through it. It also degrades gracefully without JavaScript.
A multi-page form wins as length and branching grow: progress indicators reduce intimidation, each page is a commitment point, and saving per page enables partial submissions and per-page drop-off analysis. The cost is more navigation and the need to handle Back without losing entered data. As a rough rule, switch to pages once a form exceeds roughly seven to ten fields or needs significant conditional logic.