Laminate is rated for abrasion resistance on an AC scale.
AC1 to AC2 is light domestic. Bedrooms, or a room that barely gets used.
AC3 is general domestic. Lounges, dining rooms, hallways. This is where most household laminate sits.
AC4 and AC5 are commercial grades. More than a house needs, though worth considering for a hallway in a busy family home or a rental.
The rating tells you far more about how the floor will look in five years than the thickness does. If you're comparing two laminates at a similar price, compare the AC rating.