Hook Model.

A four-step process companies use to hook users and form habits among them. The four parts of the model include: trigger, action, investment and variable reward.

The Hook Model: a summaryDaily Bits Of
Hooks: An Intro on How to Manufacture DesireNir and Far
What is the Hook Model? How does it work?Growth Hacking Studio
How to Hook Users With Habit-Forming UX DesignUX PinFebruary 1st, 2017
How To Use The Hook Model For Building Great ProductsCleverismJuly 28th, 2015
How to Manufacture DesireUX MagazineJanuary 7th, 2015
How Customers Get Hooked on ProductsHarvard Business ReviewNovember 12th, 2014