When you have a popular post that is getting a lot of traction, engagement and comments, it’s super important (IMHO) to take the time to reply to comments. And when people are sharing your posts, take the time to thank them in a comment (see above).
If you can’t think of anything to say when you are replying to comments, you can always use a funny, cute, or interesting sticker. This may seem silly, but it works and most people love it. Replying with stickers can prompt even more replies with photos, more comments or a sticker in return. Each time someone replies to your reply, your post becomes more and more popular and shows up in the newsfeed of their Facebook friends.
It can spark conversations and help your customers and supporters understand that you’re not just on Facebook to post self-promotional content, you are are actually listening to what they have to say, and you have the time to personally engage with them.
It’s time-consuming for sure, but if you’re going to run a successful page that impacts your SEO and your customer relationships, please make it a priority.