Can famous quotes be used in promotional slogans? Why?

Yes. Quotations from famous people are classic works and authoritative speeches. They generally include famous sayings, aphorisms, aphorisms, famous lines from ancient poems, etc. They are representative and can be used as promotional slogans. Famous quotes reflect the wisdom, cultivation and conduct of the sages, with profound and philosophical connotations. They are not only valuable experiences of the sages' successful lives, but also sincere warnings to future generations.