# Exercise 3: Change Metadata

The first exercise edited book content. This exercise focuses on another of the three key ingredients, the configuration file `_config.yml`. 

- make edits to the config file
- visit the Actions page and see the build process
- check that changes are incorporated (title, author, github link, etc)...could have a checklist

```{admonition} Check your understanding
:class: tip

Before moving on to the next exercise, make sure you understand the following:
1. Where is the book metadata stored?
...
```