Every tyre works at its best when correctly positioned. Here are the three general categories of tyre, along with where they need to be placed.
These have arrows on the sidewall, which, when mounted, should point in the direction the tyre will rotate when the vehicle is moving forward.
These have “inside” and “outside” printed on the sidewall and should be mounted accordingly.
Both directional and asymmetric, these can only be mounted on the specified part of the car indicated (i.e. “inner side right”).