The concept of shared responsibility in cloud computing refers to the division of security and compliance responsibilities between the cloud service provider (CSP) and the customer. The exact division of responsibilities can vary depending on the type of cloud service model (IaaS, PaaS, SaaS) being used.
The given diagram indicates the level of responsibility from IaaS to SaaS (from left to right)
In a nutshell, the shared responsibility model delineates which security tasks are handled by the cloud provider and which are handled by the customer, ensuring a clear understanding of each party's role in maintaining the overall security of the cloud environment.