Honestly, the coolest part of the Nintendo Switch experience is the Joy-Con and the variety of ways that they can be used. You can use them attached to the Switch unit, using the Joy-Con grip, separated in each hand or sideways using the Joy-Con Strap.
The Joy-Con Strap puts two physical buttons on the side of the Nintendo Switch Joy-Con. These are called SL and SR. For instance, in Mario Kart, you’ll be able to use these to jump, slide and use your items.
However, your first instinct will to be to slide the Joy-Con Strap on without reading the instructions, and if you do so the incorrect way, they’ll get stuck and and trust me, you don’t want this to happen.