Starting an online marketing campaign without investing a significant amount of time and money in keyword research would be like installing a roof on a house without a solid foundation (and with the new Google Keyword planner, you may be needing some help on that roof).
To profit from meaningful web content and successful campaigns, marketers and company owners need to identify, incorporate and make the most of popular keywords that are relevant to their niche, products or services and purpose in business. Hence the Google Keyword planner and SEO tools.