The sign you referred to as the "Location sign board" indicates the name of a location, usually a town or city. This sign is typically placed at the entrance of a municipality and serves to inform drivers that they are entering a specific area.
According to German traffic rules, when drivers see this sign, they should be aware that they need to adhere to local speed limits and other traffic regulations that may apply in that area. It's also a reminder of the local jurisdiction’s rules, which can include zoning laws, additional signage, and pedestrian or cyclist considerations.
If you have further questions about driving rules or need clarification on something specific, feel free to ask!