You can play around with it a bit to get a feeling of what the world of audio mixing is like, but after a while you’ll notice the limits of the software and will need to upgrade. It has a vast amount of features (especially for a free tool), and can be your first step into the business.
It has existed for a long time, and is the most popular DAW for people just starting out with recording their own songs or compositions. There are multiple ones out there, and most of them have quite a high price attached to them, but there is a free tool if you’re not ready to spend that much. DAW stands for Digital Audio Workstation, and is basically software that enables you to work with audio files – edit them, mix them, etcetera.