Editorial and product photography
Some businesses sell physical products. Customers want to see those products. High quality photography adds credibility to product offerings. Sometimes a well conceived setup of the product in use is even better
Other businesses have no products. They sell services. It's not as obvious what should be photographed. However, customers will more likely look at a photo than they will spend time reading your service description. A well designed photo of the execution of your service will get more attention, and those same customers may spend time reading after the photo has grabbed their attention.