Making your content accessible is a priority, and there are a lot of mechanisms you can use to improve that aspect of your site.
For large sites with a lot of pages;
For sites with a hierarchical structure;
For sites with a lot of CMS items, that are primarily on one big central collection such as a e-commerce products, courses, or a large blog.
Within pages, you may also want to improve the navigability of your content.
For long pages with headings;
For pages containing a long list of detail items from the CMS;