A product manager is responsible for product development from vision to product launch among users. The product manager is the best-known person for the needs of a sales and marketing team and helps them by educating marketing resources. The key activities a product manager should know:  Sales effectiveness  Sales efficiency  Customer engagement  Marketing effectiveness  Apart from this, while you release the MVP and collect the feedback, keep the sale and marketing team in sync and mention the revenue times and lifetime values such as KPIs.