3–5 sentences, or around 120 words and no more than 200 words Christian institutions have rapidly adopted emerging forms of digital and social media to mediate religious communication in new ways. Media usage can provide a source of renewal and strengthen believers’ faith, but religious organisations will need to learn new skills, encourage supporters to engage online, and create high-quality resources. Social media allows believers to engage in evangelism as well as participate in a Christian counterculture. At the same time, it allows for media influencers to become sources of religious authority outside traditional religious institutions. Although different patterns of usage exist, religious communication on social media can often be viewed as having a complementary relationship with offline religious participation. In Eastern and Southern Europe, Evangelical and Pentecostal/Charismatic denominations have typically made more effective use of social media than the Orthodox, Catholics, and mainline Protestants, suggesting that less centralised and hierarchical expressions of Christianity can more easily adapt themselves to the online world. Rather than reacting fearfully to new technological developments, this essay encourages Christians view it as a useful tool for collaborative engagement and communication between religious institutions and their members.