Regardless of how big or small the company size is, the responsibilities of a product marketing team or product marketing manager will likely be fairly similar across industries and verticals. Both the product marketer and product marketing manager need to be able to identify the buyer personas and target audience of a particular product and ensure that the product actually meets the needs of the target audience.
From there, product marketers not only need to determine a product's positioning with the market but make sure that the strategy that they come up with is successfully built and implemented, working alongside the sales team to reach the right customers for the product that is being promoted or advertised.
Depending on. the size of the company, the product marketing managers may sit in either the marketing team or R&D.