About components, snippets, and stationery

Custom snippets, like components, are site resources designed to be used on multiple site pages. But a component updated from one page is updated on all the other pages displaying it. By contrast, once a custom snippet is dragged or pasted onto a page, that instance of the snippet is merged with the page. If the snippet is dragged to a second page and edited there, the edit doesn't update the first page.

Stationery pages, like components, are HTML files used as site resources. But a component is a portion of a live page. Also, it maintains its connection to the live pages that use it, so editing the component updates each of the pages. By contrast, a stationery page is a whole page that you use as a template for a whole live page. Also, once you have used it to create a set of live pages, its connection with the pages is broken.