I spend a lot of time looking at other people’s computers, and I see Audacity installed on a lot of them. Not many software programs deserve the adverb “versatile”, but Audacity is one of them. It is the Swiss Army knife of audio applications.
Audacity is used for all sorts of audio tasks. There may be more specialized applications in each category, but Audacity does a great job. If you have anything to do with audio, this program deserves to be in your toolbox.