gunnar I would say putting it directly inside of page-wrapper, above or below the global styles component is your best bet.
As for if you are asking about wanting the banner to stay closed when a user clicks on the hide button, you'll need some custom code to set a cookie so that its stored for that user.
For that, you'll want to follow this tutorial on it:
https://www.flowbase.co/blog/how-to-add-cookies-to-webflow-website
Hope that helps!
