Index page vs indexed page
The two are easy to mix up. An indexed page is any page that a search engine has stored in its index and can show in search results. Your index page is normally indexed, but so are all your other public pages. You can see which pages Google has indexed in the Pages report of Google Search Console.
SEO tips for index pages
- Use one version of the home page: example.com/ and example.com/index.html should not both work as separate pages. Redirect or canonicalize one to the other.
- Link to your home page as “/” rather than “/index.html”.
- Folders without an index page may list their files to anyone; turn off directory listing on the server.