Growth hacking is a subfield of marketing focused on the rapid growth of a company. It is referred to as both a process and a set of cross-disciplinary (digital) skills. The goal is to regularly conduct experiments, which can include A/B testing, that will lead to improving the customer journey, and replicate and scale the ideas that work and modify or abandon the ones that do not, before investing a lot of resources. It started in relation to early-stage startups that need rapid growth within a short time on tight budgets, and also reached bigger corporate companies. A growth hacking team is made up of marketers, developers, engineers and product managers that specifically focus on building and engaging the user base of a business. Growth hacking is not just a process for marketers. It can be applied to product development and to the continuous improvement of products as well as to growing an existing customer base. As such, it is equally useful to everyone from product developers, to engineers, to designers, to salespeople, to managers. Those who specialise in growth hacking use various types of marketing and product iterations to rapidly test persuasive copy, email marketing, SEO and viral strategies, among other tools and techniques, with a goal of increasing conversion rates and achieving rapid growth of the user base. Some consider growth hacking a part of the online marketing ecosystem, as in many cases growth hackers are using techniques such as search engine optimization, website analytics, content marketing and A/B testing. On the other hand, not all marketers have all the data and technical skills required by a growth hacker, therefore a separate name for this field is applicable. Sean Ellis coined the term "growth hacker" in 2010. In the blog post, he defined a growth hacker as "a person whose true north is growth. Everything they do is scrutinized by its potential impact on scalable growth.