The sign you mentioned is called "Course of the priority road from bottom to left." This sign indicates that the priority road continues in a direction to the left.

In practical terms, this means that drivers on the road where this sign is placed must yield to traffic on the intersecting road coming from the left. It serves as a warning for drivers that they are approaching an intersection where they may need to yield their right of way.

Understanding this sign is crucial for safely navigating intersections and ensuring compliance with traffic rules in Germany. Always remember to watch for other vehicles that may be coming from the direction indicated by the sign. If you have any more questions about traffic signs or driving rules, feel free to ask!