Build & CMS
Component
A component is a reusable block of a page, such as a card, a navigation bar or a call-to-action section, built once and placed many times. Changing the component changes every instance at once.
The alternative is copying. A section that appears on eight pages gets duplicated eight times, and then a change to its padding has to be made eight times, and one is missed. Components replace copies with references, so there is one source and many uses.
Webflow components add properties: the parts of a component an editor is allowed to change per instance, such as the heading text or the image, while everything else stays locked to the master. That is the balance a maintainable site needs. Too few properties and every variation needs a developer; too many and the component stops being consistent.
The judgement is about what should change together. If a client asks for the card to be updated and means all of them, it is a component. If they mean this one card on this one page, it is not. Getting that right is most of what "maintainable" means.
Components in a Webflow design systemBuild & CMS