User habits are a competitive advantage. Products that change customer routines are less susceptible to attacks from other companies.

If users are not doing what the designer intended (when users are investing time, effort, etc in your product), the designer may be asking them to do too much.

Fogg states that all humans are motivated to seek pleasure and avoid pain; to seek hope and avoid fear; and finally, to seek social acceptance and avoid rejection

Reducing the thinking required to take the next action increases the likelihood of the desired behavior occurring unconsciously.

Habit-forming products alleviate users' pain by relieving a pronounced itch.

The aim is to influence customers to use your product on their own, again and again without relying on overt calls to action such as ads or promotions.

Users who continually find value in a product are more likely to tell their friends about it.