In currency exchange rates move, and customers know it. What frustrates them is calling to ask, then arriving to find a different figure. A site showing rates alongside their last-update time respects the customer and builds confidence that what is written is what they will get.
For those rates to stay right, updating them must be controlled: authorised staff only, with every change logged under its author. That protects against mistakes and gives management full oversight of the most important number in the business.
Branches are the face of the company. A finder with addresses and hours, queue booking that spreads the crowd and organised follow-up of corporate and large-amount enquiries turn the experience from a queue and uncertainty into a respectful service customers return to.