Quick actions enable users to do more in Salesforce. With custom quick actions, you can make your users’ navigation and workflow as smooth as possible by giving them convenient access to information that’s most important. A quick action can invoke a custom Lightning web component on record pages.
When you configure a component, you can choose either to display it in a modal window, or headlessly execute its custom code. For example, a quick action can open a custom Lightning web component with a form that lets users create or update specific fields on a record. A quick action can also execute Lightning web component code that navigates to another page or dispatches an event.
To use a custom Lightning web component as a quick action, add the corresponding metadata to the component’s configuration file.
Lightning web components are supported only as quick actions in Lightning Experience. UXsing a Lightning web component as a quick action isn’t supported in the Salesforce mobile app.