I often repeat code, and when I create packages, I make multiple versions, and struggle copying over what I need and keeping the files up-to-date. Luckily, this can be achieved by having a single version of your modular code that lives on github, whenever you want to update the package, you can make changes, push them up to git, and all your projects will get the new updates. No more copying your files and code snippets from file to file! This is super useful to me as I often work on 4 or 5 projects at a time.