The continuous bracket exposure 0.3 EV on my Sony alpha 7S

This morning I went for a walk around Lake Ginninderra and while I was walking I started playing with the menu on my Sony α7S. While I was stepping through the shooting menu to change from timer (I’d be using the Sony for some food photography as work) to single shot my finger slipped and I noticed more options in this menu. I came across an option for continuous bracket exposure 0.3 EV. I also noticed I could change that to 3 or 5 shots and change the exposure increment from 0.3 to 0.5 to 0.7 to 1 to 2 EV.