"Growth hacking" is a business and marketing concept that has been building momentum, particularly among tech start-ups. Essentially, growth hacking is the concept of scaling a company or product quickly by making data-driven decisions. It also dictates how the product or company is marketed to potential customers. Growth hacking eschews traditional marketing channels for low cost "guerilla" tactics that promote rapid growth. A key tenet of growth hacking is that it encourages businesses to take an outside-the-box approach to marketing, taking all aspects of operations into consideration when identifying growth opportunities.