Components are a single saved design which can be used repeatedly throughout a project. They can be updated at any time from a single location, and any changes will sync across all instances. Components are typically used to save time when editing, and to ensure consistency throughout a project.
In this guide:
Any situation where you would use a single design in more than one location is an opportunity to use a Component. Rather than duplicating or copying a design—requiring you to make any changes in more than one place—you can save it as a Component to extend one design over multiple locations. This way, if you need to make edits in the future you can just edit the Component and all instances will update automatically.