Tasks such as keeping track of the latest trends in fashion, maintaining a network of contacts, deciding what would look good on people, finding suitable dresses and accessories and either hiring or purchasing them, helping people build a wardrobe as well as dressing up people fall under the purview of a fashion stylist.
The services of fashion stylists are generally employed by newspapers, magazines and advertising agencies. In this case, they are required to dress up the models for shoots. A major part of the job involves planning what would look good on each model, deciding from where to buy or hire these dresses and accessories depending on the budget, bringing them to the shoot and actually dressing up the models. They are in charge of generating the kind of image that the newspaper, magazine or advertising agency wishes to portray.