This n8n workflow automates the process of monitoring, approving, and renewing AWS ACM certificates, reducing manual effort and ensuring timely updates. The workflow starts with a scheduled trigger, running daily to check all ACM certificates in selected regions. It filters certificates that are set to expire within the next 7 days and sends a detailed notification to a Slack channel. The notification pauses the workflow, awaiting an approval or rejection from a user via Slack buttons. If approved, it triggers AWS to renew the certificate and then notifies the team of the successful renewal, providing key details such as domain name, expiration date, and renewal timestamp. This setup is ideal for DevOps, SRE, or cloud ops teams seeking hands-off, auditable certificate management with built-in approval workflows, minimizing downtime and manual oversight.