phpMyAdmin is a free software application written in PHP, intended to handle the administration of MySQL over the Web.
Many operating systems already include a phpMyAdmin package and will automatically keep it updated. However, these versions are sometimes slightly outdated and therefore may be missing the latest features.
Additionally, the configuration process varies widely by package and may not adhere to the official phpMyAdmin documentation. That said, it is usually the quickest and easiest way of keeping an updated installation.