Varies a lot depending on the type of product you're on. If you have a B2B product, you're probably talking to the customer a lot, charting out plans with sales and marketing. On the other hand, if you have a B2C product you're looking at engagement numbers (which would hopefully in the order of thousands/millions), running experiments and doing surveys etc.
It also depends on what phase of the product lifecycle your feature is in. Early on, you're writing a lot of strategy docs putting together vision decks to convince people. During active development, you're keeping track on day-to-day activities, prioritizing features and putting out fires. You're also hopefully figuring out a GTM plan. If your product is already launched, you're thinking of v2, listening for feedback etc.