What settings to register in robots.txt and .htaccess for a one-page site (lendingpage)?

Question

Search Engine Optimization

How do search engines treat one-page sites in general?

Answer 1

And what do you actually want to do with a one-pager using robots and htaccess?
Manage the indexing of one page and control access to it?
IMHO, a one-page landing page is not for reaching the top in the search, but for mastering the advertising budget for the context.

Answer 2

none, landing pages practically do not participate in SEO.

Answer 3

Your robots depends on the site's CMS to cover part of the admin panel.
If self-written site - you can write like this
User-agent: *
Allow: /
host: site address with or without www