Software is eating the world, and SaaS is eating software. If a company is using SaaS software, then that company's data is on the SaaS provider's servers - completely out of the control of the company! Hence, there is a natural concern whether the data shared with the SaaS provider is safe and secure.
In this context, SaaS providers are asked to obtain Information Security Compliances like SOC2, ISO27001, PCI-DSS etc. As SaaS is exploding, requests for such compliances are going through the roof as well. Achieving such compliances is an extremely long and tedious process for a SaaS company. It takes months of preparation and hundreds of hours of maintenance year on year.