What does the horseshoe shaped light with an exclamation point inside of it mean on 2005 Toyota Corolla to left of speedometer?

I'm about ninety percent sure that's the handbrake. Or it could be the footbrake, but I'm not sure, so don't trust me on this. ....... he is right , don't trust him ....... the light is a low tire pressure warning light , check the tire pressure and adjust them all , check your owners manual for the warning light reset procedure ...... its just a safety feature for people that forget to check air pressure