A backup is a saved copy of your entire website - files, content, and database - that can restore everything if your site is hacked, broken by an update, or lost. It's the safety net that turns a disaster into an inconvenience.
Also known as: Site backup, full backup, backup copy
In plain English
A backup is a complete snapshot of your website at a point in time - every file, every page of content, every setting, stored somewhere separate from your live site. If anything goes wrong, you can roll the site back to that snapshot instead of starting over.
Why it matters for your business
Hacks, bad updates, accidental deletions, and hosting failures all happen. Without a tested backup, any of them can mean losing the site entirely. The catch most people learn too late: a backup you've never restored isn't proven to work.
When you'll run into it
Before any major update or change, on a regular schedule (daily or weekly depending on how often content changes), and always before migrations or redesigns.
A real example
Example: a backup taken every night at 2am, stored in a different location from your web server, that you have actually restored once to confirm it works. A backup you have never tested is a hope, not a backup - most businesses discover their backups were corrupt or incomplete only when they need them most.
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