You didn't? Because Shotokan is the pen-name of Funakoshi, also known as the 'modern father' of karate. =p It was the first major style that was really popularised in Japan (as it was first in Okinawa), and from my understanding the base style of karate that made it outside of Japan too. May even be the most practised style overall, but I'm less sure about that fact/statistics. At any rate it's a major style.
Fighting isn't full-contact with not much padding (gloves, shin-pads and mouthguard is basically it), and training involves 1 step, 2-3 step, drills and free sparing (at least in my dojo), and overall only makes up one 'third' of the training (basics and kata being the two other larger sections of training generally). They link together too. I suppose compared to other styles shotokan tends to have longer, deeper stances.