Social media is a great way to connect with your audience and build relationships. Here are the most popular channels. Facebook: Facebook has a huge user base of 1.5 billion monthly active users. It is an excellent platform to engage with your customers and get them to follow you on social media. You can also promote your posts by paying for advertising on Facebook. Instagram: Instagram is a photo-sharing app that lets you share photos and videos with anyone who follows you through the app or website. It has more than 500 million monthly active users, making it one of the most popular social media apps in the world.