Headers help drivers understand which app and what part of the app they're using.
Can include:
![4 examples of headers](https://developers.google.cn/static/cars/design/create-apps/apps-for-drivers/components/images/header-fig-1.png?authuser=6)
Template support
You can use a header in all templates except the Navigation template. In map-based templates, the header appears in the card. Otherwise, it incorporates the optional action strip.
Guidance
A header must include at least one of the following: text, app icon, or back button.