Each picture lingers in front of his eyes for no more than a moment. In a second, the person decides to open the post to read it, or continue flipping through the tape. And this decision 90% depends on the photo in the post. If the picture on the cover of your post attracts attention, likes, surprises, intrigues, evokes another bright emotion - you will get a new subscriber, and possibly a client in the future. But if instead of a high-quality, bright and intriguing photo there will be a hackneyed image from the photo stock or a blurred selfie, your failed client will continue to flip through the tape.