What is the role that played by marketing manager?

depends on corporate operation,,, but main role is to runn marketing department, plans, etc

Marketing manager is responsible like Father of unmarried bachlor who is promoting his son to various places for job/businessor for Matrimonial or is equally responsible like an owner of the product. Becoz ideally the product/services of the company will get the market in the proportion of efforts put in by the marketing manager to market the product/services.