Growth Hacking is a term developed by Sean Ellis and was popularized by Andrew Chen. Sean Ellis has been leading the marketing teams of some of the most successful startups since the 90's. However, his marketing strategies are not based off of traditional advertising. He has been able to find repeatable growth strategies to implement into products and startups on a consistent basis by using his technical skills, creativty, and his passion for experimentation.

1. Test your ideas: Every growth hacker must test their ideas. Growth hackers test everything from home pages, site metrics, placement of certain phrases/ images, etc. Everything can be optimized and tested properly through A/B tests to empirically come to a conclusion.

2. Repeatable: If a process is not repeatable, meaning it can be easily scaled and automated, then it is too cumbersome to generate explosive growth. The product and strategy must have a viral component baked into the product. 

3:Leverage Other People's Audience: LOPA is a common growth tactic. If you can get yourself or your product in front of other people's audiences, it's a major win. You can do this by guest blogging, partnering with organizations, using a company's API to improve your product, and pretty much anything else that you can think of to grow your audience on the back of other people's audience.

4. Retention: No strategy in the world can make up for poor retention. If your users aren't coming back, you must figure out why by studying data on their behavior and asking the obvious questions. 

Growth hacking is more than just a buzzword. It's a blend of art and science that takes advantage of the free and widely accessbile distribution channels on the internet. It should be developed as a way of thinking and approaching things, rather than just trying tactics that worked for other people. Most growth tactics will fail, but the ones that do work will yield incredible results.