Structural plywood, also known as sheathing plywood, is not for looks, but rather, strength for framing and building structures in which you’ll eventually cover the wood. This type of wood needs a very strong adhesive to keep the plies together.
You can use structural woods on the inside or outside of a building, but they aren’t typically as weather-resistant as other types. Structural woods usually have a C or D grade, but no higher, so they’ll be an inexpensive option compared to some woods, but they also may not have the high performance you need for outdoor structures.