WordPress Security Keys or Secret Keys are a set of random variables that are used to encrypt the data stored in a user’s cookies. These security keys are stored in the wp-config.php file.
These keys are used to enhance the security of WordPress by adding an additional layer of encryption to the information stored in a user’s browser.
By default, WordPress generates a set of random security keys during the installation process, but users can change these keys by editing the wp-config.php file. It is recommended to change these keys periodically to ensure the security of the website.