Downloading individual tracks can be helpful if you plan to use that track in a different project or for specific promotional purposes.
To download an individual audio track:
Indicate the track you wish to download and isolate the track by selecting the headphones icon.
Click the Export button, located in the top right corner of the audio editor.
Indicate the audio format and audio quality and click Export file.
Trying to download an individual clip instead? Downloading clips and downloading tracks are slightly different. You can learn more about clips vs. tracks here.