There are four pillars of certificate automation designed to bring enterprises from tactical to strategic: discovery, deployment, lifecycle management, and renewal. IETF standards, like Automated Certificate Management Environment (ACME) protocol, are gaining traction and cover most use cases for end-to-end certificate management. With complete certificate automation, enterprises reduce their risk of exposure to breaches and outages if certificates expire or are unknowingly deployed in their environment and can respond quickly and with agility as the security and business landscape continues to evolve.
Source: https://www.helpnetsecurity.com/2021/03/29/certificate-automation/