General: comfortable with working in a fast paced environment. Decent communication skills as will often need to interact with customers and coordinate with colleagues. Be able to work under pressure during busy retail hours. Having the drive to develop and learn.
Role specific skills: often acquired either whilst working or whilst training. For example if your role will be as a cashier you will be given the required till training and on how to handle money. Sometimes the specific skills you will learn will depend on the business rather than the role, as many retail organisations will have specified aspects of their staff that they want showcased for customers. However, if your are applying for a managerial or senior role you will likely be required to demonstrate leadership skills and organisational skills.
Transferable Skills: for many first time employees retail is the industry where you will likely learn base and transferable skills for other industries. Though if you have been in previous sectors such as administration, skills gained could still be transferable to retail. Skills such as using different methods of communication, attention to detail and time management.