The XML sitemap, as the name implies, is a special page on your website which lists all the other pages on your website in a format that the search engines will recognize (that's the XML part).
Your XML sitemap address (generated by Yoast SEO plugin) is available here:http://www.honeyandkale.com/sitemap_index.xml
You can find this address in your WordPress dashboard at SEO => XML Sitemaps
Now that you have your XML sitemap (automagically generated for you by Yoast SEO plugin), you need to submit this sitemap address to Google and Bing to help them quickly find all the pages on your website.
Note that you don't generate the sitemaps at Google and Bing. You rather tell them where the sitemap can be located on your website.Think of it this way:
way back then we had to fill a form on each of the search engines (and there were a whole lot of them back then) and submit each new page we built on our websites. And we had to re-submit each time we made any significant updates on the page. So if you had more than a handle of pages on your site, that alone was a whole lot of work. Today, this XML sitemap completely automates this task for us (after initially telling Google where to find your XML sitemap).