The role of a product manager in tech companies is to oversee the development and lifecycle of a product from conception to launch. Product managers act as a bridge between various teams, including engineering, marketing, and design, ensuring that the product aligns with both business objectives and user needs. They are responsible for defining the product roadmap, prioritizing features, and gathering feedback from stakeholders. By balancing technical feasibility with market demands, product managers play a key role in driving product success and delivering value to customers.