According to manufacturing.gov, Advanced Manufacturing is the “use of innovative technologies to create existing products and the creation of new products.” That's a broad definition, but oh so safe to market within.
When an economic developer says they're a great location for Advanced Manufacturing, that's a bit like a restaurant saying they have great food.
You'll never see a restaurant promoting “food,” though. They'll communicate to you things like ethnicity (Mexican, Indian, Thai, Japanese, Italian, etc.), atmosphere (casual dining, fine dining, outdoor, fast food), origin (local, imported), and type of service (buffet, coffeehouse, tabletop cooking, cafeteria). If they just marketed "food," nobody would know what they really mean so customers would go on to the next restaurant.