The full name of DRM refers to Digital Rights Management, which is an encryption tech used to protect online streaming media, such as music, videos, eBooks, and so on. When the media content is added DRM, people are not available to download or transfer them casually. This is a way to protect the content from being used illegally and causing any copyright issues. Therefore, for us, the DRM-protected media content, such as Spotify or Apple Music songs can't be downloaded for offline playback as we wish. Instead, we all need to pay for subscribing to their official plans to remove such limitations.