A "simple slogan" is a short and easy-to-understand phrase that represents an idea or a brand. It is catchy, memorable, and straightforward. Full definition
Inspired by a Tibetan Buddhist mind training practice called Lojong, author and executive coach M.J. Ryan has been using simple slogans with her clients to interrupt the habitual thought processes that hold them back. (health.com)
It played up the drama of the secret documents, featured props illustrating the amount of information acquired, and included simple slogans («Iran Lied») in big letters on a screen behind the prime minister. (vox.com)
Simple slogans don't make belief right, they just make it sound more ludicrous (religion.blogs.cnn.com)