I usually use hiveblocks.com/@geekgirl, a very useful Hive blockchain explorer.
Proposals are for projects that seek funding by DHF (Decentralized Hive Fund). People make their proposal with details why and how much needed. Then Hive stakeholders vote to approve if they think it is something useful for Hive network. If a proposal receives more stakes based votes than Return Proposal than it will get funded and start receiving asked daily amounts from Hive fund.