Your marketing will be much more effective if you tailor your message to a particular target audience. Those people who have absolutely the most to gain by using your product or service.
People buy for their reasons, not yours. You must figure out all the benefits of what you offer, who will benefit the most, and how to communicate those benefits to them in a way that gets and holds their attention as quickly as possible. Photos greatly speed up communication, but they too must be crafted to communicate the message you want and designed to appeal to the demographics of your target audience.