Focus on your buyer's benefits and requirements & target niche according to your product .Its not about only bringing likes on your pages ,real likers are those who are interested in your product too. Do conversation with your buyers ,tell them benefits of your products . They will definately buy your product .
It's always best to keep an open line of communication always with your followers. Are you interacting with them? The more you communicate with them the better off your going to be, like any new business you have to sell yourself.