Managing digital certificates, especially expirations and renewals, continues to be a challenging process for businesses of all sizes. There is also a great deal of misunderstanding about digital signatures, how they are different from electronic signatures and the need for each type. 36% of IT professionals are still relying on Excel spreadsheets to manage certificates, even though automation tools are widely available. Public key infrastructure (PKI) is a critical technology in the security ecosystem. In April alone, there were instances of certificate expiration in the gaming industry, at a large VPN and also with a major credit card company.
Source: https://www.helpnetsecurity.com/2021/08/09/managing-digital-certificates/