At least two of the following three navigation methods must be available in the website:
A main menu.
A site map that shows the structure of the website, and at least allows the user to access all sections and functions of the website.
A comprehensive search engine that provides a search on all the content (text, documents, videos, etc.).
These items should be available in the same place on every page of the website.
Note
You can, of course, choose to have all three navigation methods in the same website.
Examples of site maps..
Example of a site map included at the bottom of the page.
Example of a link to a site map in the page footer.
If required, you can provide filters with the search engine
to limit the scope of the search.
Example of a search results page grouped by relevance and themes
Suggesting corrections is an accessibility good practice.