Remember – social media is a conversation, not an advertising hoarding. People enjoy interacting with the pages they follow and it will all help the way Instagram pushes your posts if they see you are interacting with followers. It is very important to reply to comments and DM’s. This creates a connection with your followers which makes them feel more important, and more likely to continue following and spending money with you.
Additional reading: https://ideas.ted.com/how-to-have-better-conversations-on-social-media-really/