When you post something on Facebook, you want people to engage with it. This is why it's essential to have good comments on your posts. If people see that others are commenting and sharing your content, they will be more likely to do the same.
If your content is relevant and interesting or people see that you're always posting about topics they're interested in, they'll be more likely to comment on your posts. Also the more often you post, the more likely people are to see your content and comment on it.
So getting positive Facebook comments is a bit tricky and you would like to show it on your website when you get them. FS Poster lets you do it. You will display Facebook comments in your posts comment section.