Database

Definition

A database is an organized collection of data managed so applications can store, retrieve, and update information.

How it works

Most dynamic sites keep their real substance in a database: posts, user accounts, orders, settings. The application queries it constantly, whether the database runs on the same machine or a separate one. However it is arranged, it deserves the same care as your files — access controls, backups, and a tested way to restore.

Example: A WordPress database stores posts, users, comments, and site settings.

Often confused: The database holds structured application data; your website files hold the code, templates, and uploads.

Related terms

• Backup
• Content management system (CMS)
• Server
• WordPress

Learn more from Bitfoo

• Build a website backup and restore routine

Sources

• NIST Computer Security Resource Center Glossary
• MDN Glossary of web terms

Last reviewed 2026-07-19.