Why It Matters
MySQL is the database behind a significant proportion of the websites and applications you interact with daily. Its popularity means there is extensive documentation, a large community, and broad hosting support, which keeps development and hosting costs lower. For most small to medium business applications (content management, e-commerce, customer portals) MySQL provides more than enough performance and reliability. Understanding that your site runs on MySQL helps you have informed conversations with developers about performance, backups, and scaling, even if you never write a database query yourself. See the database glossary entry for the underlying concepts, or what is PostgreSQL if you want to compare the two most common open-source options.
Example
A business runs their website on WordPress, which uses MySQL to store all of their pages, blog posts, user accounts, and settings. When a visitor loads a page, WordPress queries the MySQL database to retrieve the content, assembles it into HTML, and sends it to the browser. When the site administrator publishes a new blog post, it is written to the MySQL database. Backups of the database ensure that if anything goes wrong, all content can be restored to its last saved state. Browse the full glossary for related definitions.
