What do you do when you see this traffic sign?

This sign is a mandatory direction sign in Germany, indicating that you must proceed only in the direction shown—in this case, right. According to traffic rules, when such a sign is present, you are legally required to turn right and not go straight or left.

Additionally, because you are changing direction, you must use your right turn indicator to signal your intention to other road users. This helps maintain safe traffic flow and communication.

So, the combination of "You must indicate right" and "You may only proceed to the right" is essential to follow the sign correctly and safely.