What does it mean when a girl sells placards?

This sign-raising refers to that in some public places or activities, some women will hold signs or slogans with specific content.

Girls selling placards means that in some public places or activities, some women will hold up signs or slogans with specific content to express their opinions, appeal or promote something. .

These signs or slogans usually involve various themes, such as environmental protection, human rights, social justice, etc. These women convey their voices and demands in this way, hoping to attract more people's attention and outcry. This behavior is generally considered a positive, socially responsible act.