Signals, Signs and Pavement Markings · Traffic Sign Shapes
Octagon
Always means STOP. You must come to a complete stop at the sign, stop line, crosswalk or curb. Some intersections have a sign “All Way” or “4 Way” beneath the stop sign. This means that all vehicles on all roads leading into the intersection must stop.
The driver on the left must yield to the driver on the right.
Learn it with your state's rules
DMV One Way teaches the whole handbook slide by slide and checks it with practice questions.