How kind of you to ask. A micro-study is a solution to a problem or two within a larger system that doesn't warrant a deeper dive, but requires more than a one-screen (or Shot, for you Dribbblers) explanation. Each case is borne of an experience of an interface - either virtual or tangible - which can be quickly improved upon to reduce cognitive strain.
If you'd like a closer look,
there's a handy button for that: