Youth are young people, the task force, creative, leading in the process of renovation, construction and protection of the homeland of Socialist Republic of Vietnam. Promoting the spirit of self-help, self-reliance and aspiration for the nation development among young people will create great strength in the cause of building a powerful, rich and strong country, on par with other powerful countries around the world. In the context that the world has entered the digital era, with new means and forms of information and communication, external communication plays a big role in promoting the spirit of self-help, self-reliance and aspiration for the development a prosperous and happy country among young people. The article clarifies the role of external communicaion and proposes solutions to improve the effectiveness of external communication with the promotion of self-reliance and aspiration to develop a prosperous and happy country in the modern youth.