GH is a methodology developed especially in the startup ecosystem that uses creativity, analytical thinking and metrics.
In the past marketing was based on the product, currently the focus is on the customer, and companies are willing to model their products to fit the needs of the customer. The process of growth hacking begins by achieving the product market fit, that is to say, that your product finds a place in the market. As a discipline it uses creativity, analytical thinking and metrics.
According to Ryan Holiday, Director of Marketing for American Appareil and a contributor to The New York Times, growth hacking is experimentation-based marketing and promotes the implementation of creative strategies and tactics to achieve results at very low cost.