An HTML sitemap is an interesting factor for indexation because it is something that has always been beneficial, and is potentially more beneficial than ever before, but it won’t make an appearance on most “top things to check in SEO” lists. The reason it’s important is because search engines look at the number of clicks it takes to get from the home page of your site to every other page on your site.
For instance, if you have a page on your site that takes five clicks to get to from the home page, that will be deemed less valuable than a page that takes only one click.
An HTML sitemap is fantastic for reducing the number of clicks that are required to reach each primary page on your site, without overcrowding the user experience of your site.
By adding all of the primary pages of your website to your HTML sitemap, or tree of HTML sitemaps, (because it is recommended to only have around 100 the links per sitemap page), you can dramatically reduce the number of links required to reach all pages. You can also ensure that each important page on your website is getting linked to at least once.
Note: It’s worth noting that an HTML sitemap is incredibly similar to an XML sitemap. Although it may seem redundant to do both, it is necessary because of their differences. The XML sitemap tells search engines that you have pages and want them indexed. The HTML sitemap tells search engines that you are taking care of your users and have a high priority on your content’s navigation structure.
To learn more about HTML Sitemap (how to properly and improperly implement, as well as how to find it on your site), signup for SEO Pro here