#### Data security

Learn how to keep your merchants' data safe.

##### Get started →

[Get started →](https://docs.gadget-canary.xyz/guides/plugins/shopify/advanced-topics/data-security)

#### Metafields & metaobjects

Learn how to use metadata in your Gadget application.

##### Get started →

[Get started →](https://docs.gadget-canary.xyz/guides/plugins/shopify/advanced-topics/metafields-metaobjects)

#### OAuth

Learn how Gadget implemented OAuth for the Shopify connection.

##### Get started →

[Get started →](https://docs.gadget-canary.xyz/guides/plugins/shopify/advanced-topics/oauth)

#### Billing

Learn how to bill merchants for your applications.

##### Get started →

[Get started →](https://docs.gadget-canary.xyz/guides/plugins/shopify/advanced-topics/billing)

#### shopify.app.toml files

Learn how to set up your shopify.app.toml file in a Gadget application.

##### Get started →

[Get started →](https://docs.gadget-canary.xyz/guides/plugins/shopify/advanced-topics/shopify-app-toml)

#### Building extensions

Learn how to build Shopify extensions in your Gadget application.

##### Get started →

[Get started →](https://docs.gadget-canary.xyz/guides/plugins/shopify/advanced-topics/extensions)

#### Customer account UI extensions & authentication

Learn how to use your Gadget application in a customer account UI extension.

##### Get started →

[Get started →](https://docs.gadget-canary.xyz/guides/plugins/shopify/advanced-topics/customer-account-ui-extensions)