Reviewers can use the context panel within the review writing module to gather concrete examples of a reviewee's performance over time. The context panel is dynamic, and it will update with new data even after the review cycle begins.
Note: Not all reviewers will have access to the same level of detail in the context panel. Some information will only be visible to reviewers who have custom permissions. Contact your internal Lattice admin(s) if you have questions about your permissions.