The interrobang ‽ is a visual symbol and a logo for KnowYourPlace (KYP) apps. Miriam-Webster explains it:
Most punctuation marks have been around for centuries, but not the interrobang: it's a product of the 1960s. The mark gets its name from the punctuation that it is intended to combine Interro from "interrogation point," the technical name for the question mark, and bang the printers' slang for the exclamation point.
Martin K. Speckter, head of an advertising agency conceptualized the interrobang in 1962. The single punctuation mark to represent surprised rhetorical questions was proposed in an article in the magazine TYPEtalks.
The interrobang is a good representation of KYP. It indicates the use of interrogation (quiz) and of interesting and informative content to provide a enticing learning environment.