A user journey map is a visualization of the process a user goes through to achieve a goal with a product or service. It helps to understand the user's experience from their perspective.

A user journey map is a visualization of the process a user goes through to achieve a goal with a product or service. It helps to understand the user's experience from their perspective.

The correct option is:

• It helps us understand how users feel and what they do at each step of their experience.

This option accurately describes the purpose of a user journey map, which details the user's actions, thoughts, and emotions at each touchpoint of their interaction with a product or service.

The final answer is $\boxed{\text{It helps us understand how users feel and what they do at each step of their experience.}}$