IAM (Identity and Access Management) is important because it helps organizations control who has access to their resources, and what actions those users can perform. This is essential for maintaining the security and integrity of sensitive data, and for complying with regulatory requirements. IAM also makes it easier for organizations to manage user access across multiple systems and services, and to quickly revoke access when necessary. Additionally, IAM enables organizations to implement a "least privilege" model, where users only have the permissions they need to do their jobs, which can help prevent accidental or malicious breaches.