Startup Idea : One inteface to promote ALL the local Business

Today the major challenge for ALL the locals Businesses is to get customers and get the best visibility. My idea is to create a UNIQUE interface with all the Businesses (all kind of business) can make their promotion and get a visibility. For this I want to create a Website (+ app later) where the business will put and update (regulary) their deals to attract the customer (they can decide the deal and the deal doesn t have to be so agressive as Groupon). The web visitors/custpmers will discover all the deals available in their area from their local shop and businesses. The idea is to provide the Best visibility for all the local businesses and allow the customers to discover their local shops/services with attractive deals.