
In the mid-19th century, a strong revival took place in Sweden. It was a complete explosion in the media. A book titled “Come to Jesus” by Peter Fjellstedt was published in 1853 and within a few months it had sold 50,000 copies. EFS publishing soon became the largest book publisher in Sweden. In 1872, its published writings were estimated to amount to 5.4 million. Rosenius’ writings were printed in 2 million copies. Between 1840-1853, one million tracts were distributed in Sweden.
It is estimated that the fastest growing church today is in Iran.
Nima Alizadeh, who is now in the United States, tells how his church in Iran was good at evangelizing. In the past 20 years, that church has planted about 25 other small groups in 12 cities. And the same is happening throughout Iran. It is done through satellite TV, smuggled Bibles, tracts, and now through the Internet and social media.
Other examples of areas reached through modern media are Vietnam and Africa. In Vietnam, 17 percent of young people use social media more than 4 hours per day.
https://www.thegospelcoalition.org/article/meet-the-worlds-fastest-growing-evangelical-movement/
In his book “Communicating Christ Cross-culturally,” Donald Mc Gavran gives the advice
1) to use different types of media,
2) to be aware of what is viable in the culture (Ex: Some places still use physical billboards to reach out) and
3) to ensure that media efforts are connected to relationships.