What is prefix of WordPress table by default?

The default table prefix for WordPress is wp_.

For example, a common WordPress database table is wp_posts, which stores the content of website articles and pages.

Changing the default table prefix can enhance website security by adding an extra layer of complexity to the database, making it harder for automated tools to guess table names and thus providing stronger defense against attacks such as SQL injection.

During WordPress installation, you can modify this prefix through the installation interface or directly edit the $table_prefix variable in the wp-config.php file prior to installation to achieve this.