Page RPM is important, but it's not the only metric to consider. You should also look at other numbers like how many people click on your ads (CTR), how much you earn per click (CPC), and how often ads are shown (fill rate). It's like looking at different pieces of a puzzle to see the whole picture! It's essential to strike a balance between different metrics and consider the overall performance of your ads to optimize your ad revenue and achieve your goals.