The phases of product marketing are Discover, Strategize, Define, Get Set, and Grow. In the Discover phase, product marketers gather information and insights. In the Strategize phase, they develop a go-to-market plan. In the Define phase, they identify buyer personas and shape the customer journey. In the Get Set phase, they equip the team with training and enablement. In the Grow phase, they focus on post-launch processes for continuous growth.