Explore cert-manager's complexities through a conference talk presented by project maintainers Tim Ramlot, Maël Valais, and Ashley Davis. Delve into five levels of difficulty, starting with obtaining TLS certificates using Ingress/Gateway annotations and progressing to developing custom issuers, CSI-drivers, and approver-policy plugins. Learn about generating Secrets with private keys and certificate chains, issuing certificates from private PKIs, distributing CAs with trust-manager, and utilizing CSI-drivers and approver-policy. Gain valuable insights into features, use cases, and best practices, empowering both beginners and experts to master cert-manager with confidence.