Mid-Side (MS) stereo is one option for recording in true stereo using two microphones. To me it is the most natural sounding of all the recording techniques. Other possibilities include an XY coincident pair, or the Blumlein technique. Middle-Side uses two microphones; one in the Figure-eight polar pattern placed off axis and the other mic can be in any polar pattern but omnidirectional is my favorite because it makes use of the full dynamics of the microphone and sounds the most spacial. Also, Omni gets the bass response of any condenser pattern.
I love Mid-Side stereo. You can set up two mic in the middle of a nice room, surround them with musicians on all sides (if you’re using the mid mic in omni) and record the whole room. It’s obviously not a close mic situation, but you can put a vocalist right up there. The rest of the room will sound like a room. All the natural reverberations included. This is the original way to record. No overdubs so you have to get it right the first time!