Database
A database is a structured collection of data used for websites, e.g., MySQL for content, users, or products. It is essential in hosting for dynamic sites, and in web design and SEO for fast queries and scalability.
The database is the memory of the website. In WordPress, it stores posts, pages, settings, comments, and all the additional information that plugins store. It's precisely this last point that makes it grow over the years.
A typical finding: A website with 300 posts has a database of 40 megabytes, of which 25 megabytes are old post versions and remnants of uninstalled extensions. After cleaning up, 12 megabytes remain, and the response time in the editorial area drops noticeably. Limiting the number of saved versions per post to 5 keeps the problem permanently manageable.
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