In POP Custom, what is the H2-H6 section? What about the H4-H6?

If you are using POP Custom, the sections for H2-H6 and H4-H6 are to help cover any rounding issues that come up in the tool's math. Sometimes a couple signals are both very close but on their own aren’t enough to recommend increasing or decreasing to each individual signal area. If we group the signals together we can see potential optimization strategies that could have been missed.

That said, we highly recommend following POPs Custom Strategy tab recommendations. POP pulls out the most important things for you to focus on. Usually, the best way to make optimization decisions is to follow the Priority Tasks based on your chosen Strategy and Approach.