Product Managers play a very important role in the success of a product because they allow the specialists to focus on their role. An designer is good with UX and UI but doesn't necessarily want to create product requirements. An engineer is mostly interested in code but is not really tuned to what the customer needs.
Designers, Engineers, Sales perform well when they have deep narrow focus and goals. The Product Managers' job is to allow them to excel in their specialist role much like the conductor of a multi-piece orchestra.
Designers, Engineers, Sales perform well when they have deep narrow focus and goals. The Product Managers' job is to allow them to excel in their specialist role much like the conductor of a multi-piece orchestra.