I have a notebook for which I’d like to specify the meta tags so that it shows up properly in search engines (most importantly the description tag below, but the others as well). How to do this?
<meta name="description" content="...">
I do not think it is possible
Tom is correct, the description cannot currently be set. However, search engines (especially Google) largely ignore the meta description anyway these days.
This is not my experience with meta tags, at least for small, hand-coded sites (though I don’t use Google so what you say may be correct there). But regardless, search engines often get descriptions quite wrong for observable pages. And this seems a real problem if one wants their observable notebook pages to be part of the larger ecosystem
Seems like a use-case for Observable Notebook Kit | Observable