What is the purpose of the 'SALT' keys in 'wp-config.php'?

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Grade: Education Subject: Support
What is the purpose of the 'SALT' keys in 'wp-config.php'?
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The 'SALT' keys, also known as authentication keys, are unique security keys that help encrypt user cookies and session data. They are crucial for the security of your WordPress site, preventing attackers from hijacking user sessions. You can generate new salts from the WordPress official API and update them in your 'wp-config.php' file.