Back up files and database
Uploads, themes, plugins, configuration, posts, settings, users, and orders can all matter.
Keep copies off-site
A backup on the same server may be lost during a server failure or compromise.
Set a schedule
Choose frequency based on how often the site changes. Stores often need more frequent backups than static sites.
Test restoration
Practice restoring in staging and document the steps.
Further reading
This guide is educational. Check current documentation before making technical or purchasing decisions.