An embedded widget is always visible on the customers page and is typically injected in to a specific element in the customers page. This type of widget is typically used for WISMO or Return widgets.
See this document for details on how to configure an embedded widget: https://docs.digitalgenius.com/docs/embedded-widgets
We suggest the following styling which can be achieved by taking the config in the prechatForm -> welcomeMessage config and the widgetStyles -> styles config