Submit a sitemap using Yoast SEO.
This is for those of you who have set up a Google Webmasters account and would like to submit your Yoast XML sitemap there.
Step 1 - Use the steps on the previous page to open and check that your xml sitemap has been generated on your website.
Step 2 - Highlight "sitemap_index.xml" in the page url and copy it to your clipboard as shown below:
Step 3 - Head over to Google Webmasters and open "Sitmaps" in your dashboard as shown below:
Step 4 - Click on "add/Test Sitemap" on the top right hand corner of the page.
Step 5 - Paste your clipboard in the box provided and then click on either "Test" to check that the xml file is working, or "Submit" to submit your Yoast Sitemap.
And that's it, you're done!