Digital Audio Workstation (DAW).
At some point you might want to record some of the music you have been playing. Of course you can hold your phone next to your guitar and record, and at times you don't need more than that. But what if you want to do a bit more, actually record a full song, or multiple layers of instruments. That's when DAW's come into play.
What are some of your favorites? What are the ones that in specific cases do a thing really good, but in other scenarios not so much.
I'm a huge fan of reaper. Very nice daw to work with and really reasonably priced for small business/personal use license of $60. Works on Linux, Mac, and Windows.
Its pretty customizable and comes with intgrated plugins that are pretty powerful once you learn to use them. Like any daw, theres a bit of a learning curve and while its not as popular as some other daws, I highy recommend it. I have not found a daw that I like more.