What is the different between at and in and on?

Answer 1

'At' is for general places: at the shop, at my house, at your party

'In' is for something that has space: in the room, in the car, in the box

'On' is for something that you can put at the top: on the table, on the ground

Answer 2

"At" is used to indicate a specific point or place, "in" is used to show inclusion within a space or time period, and "on" is used to indicate the location of something on a surface or in a position.