Invite Comments

The next tip to increase likes on Facebook is to get Facebook users to comment on your posts. Grow your community by asking questions or asking users to post tips and suggestions on your content. Invite your friends and ask them to tell their friends to comment on your post.

Try to write some creative comments, so that users will engage more proactively.
You need to understand it is equally important for you to comment on other pages. You need to find posts from pages within your industry.

Comment on their content to spark a conversation and facilitate a discussion. While doing this make sure you’re not spamming other posts.
Comment genuinely without the intention to just create a backlink.