Social media is a wonderful tool that the Lord has allowed His people used to engage with Christians in other cities that they would normally not be able to go. Social media is a also a chance to interact with people who may not know Jesus. Whatever your reason is being on social media, I hope you keep one thing in mind: Be Christ-Centered.
Yes, social media is where we tell one another our location, what we are having for dinner, and show our excitement when our favorite sports team wins a game. These are all good things, but we must always be Christ-centered. Let us not forget to share what God is doing in our lives, share a passage or two, or even share a post from a Christ-centered website.
In your dealings with people on social media, remember you are Christ's ambassadors. The lost world is watching. We must exhibit Christ-centered conversations in all our interactions on social media. If you talk about your differences, please be respectful (Those who like baptism debates on Twitter, that goes double for you).
Colossians 4:6 says that our conversations should "always be gracious, seasoned with salt, so that you may know how you ought to answer each person." That not includes people in our daily living and church body, but also the ones we interact with digitally. Hebrews 3:13 says we are to "exhort one another every day." Granted, we are not all part of the same local church, but we are still all brothers and sisters in Christ. We must exhort another especially on social media.
As I said, social media is a wonderful tool, but we must honor Christ like in everything else and be Christ-centered in our interactions with those who follow us or just happen to be in on the conversation.