I also use it sometimes when I am traveling and don’t want to bring a lot of equipment with me.
Blue Icicle($49) In simple terms, this allows you to plug an XLR cord (which is what the Shure SM-58 and many other microphones use) into a USB port. This is a great option if you decide to purchase a non-USB mic. When I first started podcasting and had only a one microphone setup with no mixer this is what I used. I also use it sometimes when I am traveling and don’t want to bring a lot of equipment with me.