# Create an action
URL: https://docs.awellhealth.com/docs/extensions/create-an-action

> For the complete documentation index, see [llms.txt](https://docs.awellhealth.com/llms.txt).



An action is where an extension does something. The action code defines:

1. Basic metadata such as the title, icon and category.
2. How the care flow author configures it, through [action fields](/docs/extensions/action-fields).
3. The logic that runs when the action is activated in a care flow, in
   [`onEvent`](/docs/extensions/on-event).

## Title and category decide how the action appears in Studio [#title-and-category-decide-how-the-action-appears-in-studio]

### Start the title with a verb [#start-the-title-with-a-verb]

By convention, an action title starts with a verb: send SMS, schedule appointment, generate random
number.

In Studio an author picks from a list of actions, and verbs make that list read as things to do.

### The category decides where the author finds it [#the-category-decides-where-the-author-finds-it]

Actions are grouped by category in Studio, and the category must be one of the predefined ones.

## Next steps [#next-steps]

**Next:** [Action fields](/docs/extensions/action-fields) to define what the author configures.