Automatic Vs Manual Sitemap
An automatic sitemap is starting with a sitemap.xml But manual sitemap is that where you make site architecture on the website. It can be on one page or on navigation like a tree structure.
The tree structure is that where you have web pages like a leafs on a tree.
On Blogger you don't need to to make manual sitemap but if you are managing your website on another platform then make sure the way of making the sitemap.
The sitemap should look like
You can make an HTML sitemap where you think it is good for website navigation. It will be the web page with the extension .html
Moreover, read multiple sitemaps.
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