There are three main types of cloud services discussed in the document:
1) Infrastructure as a Service (IaaS) requires technologies to verify workload integrity, alert to unauthorized changes, and track incidents as the provider cannot do this. Point solutions and broader providers offer these controls.
2) Software as a Service (SaaS) presents risks if providers mishandle sensitive data or have authentication/application weaknesses exploited. Users should control access and encrypt data.
3) Governance is needed to track cloud service use, as without it companies lack visibility into how data is used and exposed. Technologies help monitor usage and set policies to mitigate risks and protect data.