At Google, pretty much any of the engineers can go and get a job at another company whenever they want. So they tend to have access to internal mobility; Google would rather let them fill a different job at the company than have them quit. Thus, managers (either engineering managers or product managers) don't have a lot of coercive capability.
The path to success is to not be a manager who forces people to do your bidding, it is to be a leader who persuades your colleagues of your vision. At times the tool of command can be used, but it's best used lightly.
My goal is to be service-oriented: my job as a manager is to help my engineers be super-successful, and one of the ways I try to do that is by finding paths for the organization to build great software and leading my team and other teams to cooperating to build it.