The default WordPress database tables are built primarily for blogging and the basics of content management systems, even though we can use them for large-scale advanced applications. The default features are handled by 11 core database tables. We also use several plugins that add more data to these default tables. As the site gets larger, we may experience performance issues due to storing large amounts of data in a limited set of tables. So, it's essential to regularly track the database for unused data created by WordPress' core features and obsolete plugins. Then, we have to clean the data that is not part of any existing features.
In this recipe, we are going to use the Advanced Database Cleaner plugin to identify the unused data in the database and clean it up manually after proper reviewing.