# Variables & Collections

> Learn how to create and manage variables and collections with the Designer API.

Variables are reusable design tokens that let you [define and manage values across your Webflow projects](https://university.webflow.com/lesson/variables?topics=layout-design). They enable you to create a single source of truth for common values like colors, spacing, and typography. When you update a variable's value, that change automatically propagates everywhere the variable is used, making it easy to maintain consistency and make global design updates.

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