Diagnose before you change: objective, delivery status, spend
how-toYou would not call a coin unfair after two flips.
A traffic and a sales campaign "are simply not measured the same way"; a leads campaign cannot be judged on click-through rate alone. Delivery states (active, off, limited, in review, rejected, learning) come first - while learning, the numbers cannot be trusted yet. Then read amount spent: the same cost per result "means something very different at 50 rupees spent versus 50,000."
Most bad optimisation decisions are made on too little data.