Want to maximize my chances of getting a PPO, what should I focus on before and during the internship?

My summer internship is starting in around 2-2.5 months, and my only real goal is to convert it into a PPO (great compensation and I am scared to sit for placements).

I just wanted to ask people here who've already gone through this, what actually mattered? Like before joining, are interns expected to already know the company's tech stack, or do teams usually expect you to learn most of it once you start? And during the internship itself, what really makes the difference for getting a PPO? Also what kind of work do interns usually get? Are you expected to ship real production features, or is it more like smaller tasks and learning stuff along the way?

Would love to hear from people who got a PPO or have mentored interns. Just trying to understand what I should focus on so I don't mess up this golden opportunity. Thanks :)