@steverobertJan 19.2019 — #ROR is actually a kind of XML format intended to describe any kind of web content in a generic way. It can help to understand the site.
There are many opinion for this concept....may be some create confusion...
I think as per your question it may be beneficial for keyword ranking because it helps crawler , search engine to understand your site in a proper way...
@RH-CalvinMar 12.2019 — #ROR is a rapidly growing XML format for describing any object on a website (sitemaps, products, services, menus, images, reviews, contact info, business info, etc), so any search engines can better understand its content.
@LearnTheNewMar 13.2019 — #Basically, Sitemap is for your site indication of how many urls are in your website. It's doesn't improve any keyword ranking it is just a part of SEO activity. @LearnTheNew