Service Level Objectives (SLOs) and Service Level Agreements (SLAs) are related but distinct concepts.
SLOs are performance targets that are set for a service. They define the expected level of performance and availability for a service, and they are used to measure whether the service is meeting those expectations. SLOs are typically established by the service provider, and they are used to guide the design, development, and operation of the service.
SLAs, on the other hand, are agreements between a service provider and a customer that define the level of service that the customer can expect to receive. SLAs typically include a set of metrics and targets, similar to those in SLOs, but they also include details on how service level failures will be handled and what compensation the customer can expect to receive if the service provider fails to meet the agreed-upon targets.
In summary, SLOs define the service performance goals for the service provider to meet, SLAs are agreements that are established between service provider and its customers on the level of service that the customer can expect to receive, which may include the goals defined in the SLOs, but also outlines the compensation and penalties in case of service level failures.
Also, SLOs tend to be more internal and focused on technical aspects, while SLAs tend to be more external and focused on customer-facing aspects.