Ansible Vault is an Ansible feature that allows you to keep sensitive data such as passwords or keys in encrypted files, rather than as plaintext in your playbooks or roles. This helps to protect these sensitive pieces of information from being exposed.

Example:
You have a playbook that needs to access a database, but you don’t want to store the password in plaintext. You can use Ansible Vault to encrypt the password and store it in an encrypted file. Then, when the playbook needs to access the database, it can read the encrypted file and use the password to connect.

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