Just because someone liked your business page doesn't mean they are reading your posts, or after the new Facebook algorithm update, they may not even be seeing your posts.
Page "likes" are only the beginning of the relationship. Social media and networking is about building relationships and not just advertising yourself.
When you posts are "shared", it is usually an indication that someone not only liked what you posted, but wanted to share it with their network of friends as well.
Your marketing goals should include posting interesting and relative content on your page and sharing other people's posts. When you share theirs, they become more interested to see what you are posting. If you share someone else's post, they might be motivated to come back and comment on your shared post, which then keeps your page name in front of their network, and their network's network, and so on, and so on....
1. Post great content that people want to tell their network about.
2. Share content that you find interesting and you want to tell your network of friends and fans about
3. Make comments with substance and invite continued interaction.
4. Comment from your business page, not your profile, if you want people to be drawn to your business page.
Wishing you awesome and continuing success.