What does rotation abc mean in warframe?

In Warframe, "rotation ABC" refers to the cycles of reward tiers in missions, particularly in missions like Survival, Defense, and Interception. Each rotation denotes a specific set of rewards, with "A" typically being the first tier, "B" the second, and "C" the third. Players often use this terminology to strategize when to extract or continue farming for rewards, as the cycle resets after completing a certain number of waves or duration. Understanding rotations is crucial for maximizing resource and item collection during these missions.