PMs must bridge builders and sellers

You're taking the building side of the organization and the selling side of the organization and bringing it together. You're taking all of the commercial motivations and goals of the company and making sure that what you build actually solves for those goals.

If you're leaving something on the table in terms of the kind of impact that you are having at your job, that's probably the thing that you're leaving on the table. You're probably already doing a good job of collaborating with engineering and design. It's probably the sort of sell side that there's an opportunity for you to have more impact.

You are the only discipline, which is the co-collaborator for all of these disciplines and tying all these things out. So it's not about you standing alone, it's you always collaborating and pairing with someone else. But you are the only one who's pairing with everyone else.

Raise difficult issues without being difficult to work with. Bring out important topics without drawing importance to yourself. And you are in charge of getting the decisions made and not making all the decisions yourself.