What part of YouTube Analytics do you find hardest to understand?

YouTube Studio gives creators a lot of data — impressions, CTR, average view duration, watch time, traffic sources and more.

While building WorkVistaIQ, I realized that the challenge often isn't accessing the data, but understanding what deserves attention.

If you're a YouTube creator, which metric or part of YouTube Analytics do you find most confusing?

I'd love to use the feedback to improve WorkVistaIQ.