Is BTCB different from BTC?

Could you please elaborate on the difference between BTCB and BTC? I've heard about both, but I'm still a bit hazy on the specifics. Are they both cryptocurrencies, but operate differently? Or is BTCB some sort of derivative or token based on BTC? I'm curious to know how investors might view them differently and what advantages or disadvantages each might have in the market. Could you break it down for me in a way that's easy to understand? Thank you for your time and assistance.