What should I say in a performance review?

You should say both positive observations and constructive criticisms to your employee in a performance review. It's important to let employees know the good things you've seen them doing in addition to calling out their weak points, and don't forget to provide resources and support on how to improve those weak points.

If you're the employee in the performance review, talk about how you've grown, projects you're proud of, and areas you'd like to grow in in the future. You can also ask questions about professional development opportunities and talk about what your boss could provide that would help you be more effective at your job.