Homebrew makes managing packages on macOS easy. However, Apple’s new silicon is based on ARM64 architecture. This means that not every package or app can run natively (yet). Thankfully, Rosetta 2 helps bridge the gap by “translating software” so it can run on this new architecture.
I'm getting one of the new M1's for work so I know I'm going to need this. I'm sure other's might too.