If you want to proclaim and transmit something to a bunch of people, then what better way to do it than advertising? Yup, this word refers to various types of promotions, like those for products, services, or ideas. Or, when it comes to transmitting all the things a leader proclaims, you can also call it propaganda.

This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.