Picture of a signboard standing at the entrance

Quick answer：

This refers to a visual depiction of a signboard placed at the entrance of a building, store, or public space. Signboards are commonly used for advertising, indicating directions, or providing important information. In terms of knowledge, signboards can be made from various materials like wood, metal, or plastic, and are often illuminated to be more visible at night. They are an essential part of urban and commercial environments, serving as a means of communication between businesses and the public.