A great way to sell to your customer is to inspire them. When adding images to your business page, use those which will inspire your customer to do the same. If you can add images of previous clients who have lost weight (for a personal trainer site), or can show a client learning how to cook (for a business that teaches people how to cook), then this is going to resonate with your followers.
It is going to show them people who were in a similar position as their own, making positive changes and doing things that bettered their lives. It will in turn inspire your followers to want to get up and do the same, and will make them want to work with your business to help them make the positive changes which they seek in their own lives.