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## Resource: Function Architecture

## Article: Function Architecture

## Article Link: https://dev.wix.com/docs/api-reference/business-management/functions/function-architecture.md

## Article Content:

# Function Architecture

Several components work together to provide additional capabilities for Wix sites through Functions. Understanding these components helps you create and manage functions effectively.

<blockquote class="tip">
  <strong>Tip:</strong>
  
  To get the most out of this article, first [create a function](https://support.wix.com/en/article/wix-functions-creating-a-function#creating-a-function) in a site's [dashboard](https://www.wix.com/my-account/site-selector/?buttonText=Select%20Site&title=Select%20a%20Site&autoSelectOnSingleSite=true&actionUrl=https:%2F%2Fwww.wix.com%2Fdashboard%2F%7B%7BmetaSiteId%7D%7D%2Ffunctions/manage).
</blockquote>

## Function types and templates

When you create a function in the dashboard, you choose a **type of function** from the **Function catalog**. These are function types created by Wix that define:
- When the business solution calls your function.
- What parameters the function accepts.
- What the function returns.

Function templates provide pre-configured automation logic that you can customize for specific function types. This makes function development more efficient by providing a starting point for common use cases.

With the Functions APIs, just as in the dashboard, you can create a function from a function type (**start from scratch**) or a function template.

Apps made by Wix create function types and templates that are only available on sites with the app installed. Use the [Function Types](https://dev.wix.com/docs/api-reference/business-management/functions/function-types/introduction.md) and [Function Templates](https://dev.wix.com/docs/api-reference/business-management/functions/function-templates/introduction.md) APIs to retrieve the list of available function types and templates for a site.

## Function components

A working function requires several components that work together. You need to define the function's logic and, for functions built from some function types, its [service plugin configuration](https://dev.wix.com/docs/api-reference/business-management/functions/about-wix-functions-apis.md#terminology). 

### Function logic

An [automation](https://dev.wix.com/docs/api-reference/business-management/automations/introduction.md) defines function logic, and a function method attaches it to a function. You only need to set up the connection once, and to update the function logic, you only need to update the automation.

### Service plugin configuration

Manage your functions' service plugin configurations using the [Function SPI Configuration API](https://dev.wix.com/docs/api-reference/business-management/functions/function-spi-configurations/introduction.md).

Learn more about [service plugins and Wix Functions](https://dev.wix.com/docs/api-reference/business-management/functions/about-service-plugins-and-wix-functions.md).

## See also
- [About Function Creation and Activation](https://dev.wix.com/docs/api-reference/business-management/functions/about-function-creation-and-activation.md)
- [About Wix Functions APIs](https://dev.wix.com/docs/api-reference/business-management/functions/about-wix-functions-apis.md)
- [About Service Plugins and Wix Functions](https://dev.wix.com/docs/api-reference/business-management/functions/about-service-plugins-and-wix-functions.md)
- [Supported Function Types](https://dev.wix.com/docs/api-reference/business-management/functions/supported-function-types.md)
- [Sample Flows](https://dev.wix.com/docs/api-reference/business-management/functions/sample-flows.md)