Who benefits from PPP?

Good day, I'm curious about the beneficiaries of PPP, or Public-Private Partnerships. Could you elaborate on who stands to gain from these arrangements? Are they solely limited to governments and private corporations, or do they also extend benefits to other stakeholders such as the public, small businesses, or even the environment? Additionally, how are the benefits distributed, and are there any potential drawbacks or concerns that should be considered when evaluating the effectiveness of PPPs?