It's a big mall with an amusement park inside. A majority of it is the typical clothing/department stores that you can find at any other wall.
There are some fun gimmick stores like game stores, a cheese store, beef jerky store, and even this awesome store with all these cool liquors: https://www.vomfassusa.com/collections/spirits , but a lot of this fun stuff is out of the way, whereas all the typical mall stuff is front and center.
There's a decent food court and a few restaurants, laser tag and bowling, a movie theater, at least two arcades, and I think a VR place.
You could kill a day there, but be prepared to spend money, all the fun stuff is expensive.
If you are referring to Smaaash on level 4, they got shut down a couple weeks ago. I've heard conflicting stories of why, but I did like that place when it was around.