Internal signage sets the tone in your workplace.
When someone walks through the door, will they sense you are proud of what you do? Will they know where to go to get what they need? Will they understand you have a great offer available on a particular product?
Internal signage allows you to communicate something of who you are when people enter your business. It allows you to present your business professionally and guide people around the site. It also acts as an effective point of sale tool to promote what you do.