BNB Smart Chain (BSC) is a blockchain network built for running smart contract-based applications, offering high throughput, cheap transactions, and compatibility with Ethereum.
Yes, BEP-20 is a token standard on BNB Smart Chain for creating and issuing tokens, similar to Ethereum's ERC-20.
There is no difference between BNB Smart Chain and BSC. These are two names for the same blockchain platform, which was previously also known as Binance Smart Chain.
The BNB Beacon Chain focuses on governance and staking of the BNB token. Actually, there isn’t much to do on the BNB Beacon Chain apart from sending, receiving, and staking BNB. Meanwhile, the BNB Smart Chain (also known as BSC) is designed for smart contracts and decentralized applications. BSC is your network of choice for trading and using DeFi.
Your choice between BNB Beacon Chain and BNB Smart Chain depends on your needs. Use Beacon Chain for staking BNB. And use Smart Chain for developing or using DApps (decentralized exchanges, lending platforms, yield aggregators, and more).