Podcast
For IOS Apple devices. When you are subscribing to the podcast updates by that particular podcast producer. With iCloud, you can synchronize your podcast subscriptions across all devices..
Download
digital transfer of music via the Internet into a device capable of decoding and playing it, such as a personal computer, portable media player, MP3 player or smartphone
Play/Listen
online streaming music, you can listen to music directly from an audio signal on the Internet. You hear it as it arrives on your device, as opposed to other services like iTunes or Amazon