Fix your thoughts on what is true, and honorable, and right, and pure, and lovely and admirable. Think about things that are excellent and worthy of praise...--Phillipians 4:8
Once upon a time, communication meant "word of mouth". In some parts of the world, that's still the case, and in others the "preferred" method of communications has moved from hand-written letters to printed material, newspapers, mass media and electronic communication, including social media and online platforms that again enable word of mouth exchanges. Communication is fast and immediate. 
There are many ways to share the Gospel. Different generations listen for the Word through different vehicles. Churches today must reach out to all through every means possible. Remember Jesus didn't wait for people to come to him. He went to them on their territory.
Social media -- particularly Facebook, Instagram, and Snapchat -- enable churches to connect with segments of their congregations and the community regularly and quickly. But it's important to develop a policy to guide the use of social media in your context. Resource UMC can help. Here's a sampling of key articles.