There is no one-size-fits-all answer to this question since it can vary depending on the specific agile framework being used. However, in general, an OKR (Objectives and Key Results) is a performance management system that can be used in agile environments to help teams track and measure progress towards specific goals.
OKRs can be adapted to fit the needs of any organization, but they typically involve setting objectives (what you want to achieve) and key results (metrics that will help you measure progress towards those objectives) at the team, individual, and organizational level. Periodically, teams and individuals will review their progress and adjust their objectives and key results accordingly.
If you're interested in learning more about OKRs and how they can be used in agile environments, here are a few resources that may be helpful: