Regularly update the sitemap.
Clean up deleted pages and add new ones.
Let a pro handle the details
HTML Sitemap Generators
XML-Sitemaps offers a Free HTML generator for up to 500 pages. Add the website address and when the generator has produced results go to the bottom of the screen and download the HTML sitemap or all sitemaps (HTML+XML in a zip file), which you should upload into the root folder of your website.
Note the Rank Math plugin creates HTML sitemaps too.
XML Sitemap Generators
XML-Sitemaps also offers a Free XML generator for up to 500 pages. Add the website address and when the generator has produced results go to the bottom of the screen and download the XML sitemap, which you should upload into the root folder of your website and submit it to the Search Console Sitemap section.
Do you prefer to let AI create your sitemap? I have to warn you it can be messy. Go to your favorite AI tool and give it this prompt:
Develop a complete website sitemap for our website [URL] to improve search engine crawling
Don’t forget to replace [URL] with your website address. On most AI tools, you will need to do some manual work, yes I know it sucks but those bots are still infants and they can’t crawl.
Sitemap Validation
offers a very useful tool to validate your uploaded sitemaps so they don’t get rejected when submitted to the engines.

Screaming Frog Sitemap Audit
Open your Screaming Frog software and from the Top menu go and select / Mode / List. Then hit Upload and download an XLM sitemap file. Give the address and wait for SF to crawl the page.
To find the sitemap address you can check the default address e.g. domain.com/sitemap.xml, or if the sitemap is produced by a plugin (very common) give
/sitemap_index.xml
for the XML Sitemaps Yoast SEO, and Rank Math plugins.
Other common sitemap addresses are: /post-sitemap.xml for posts, /page-sitemap.xml for pages, that’s all that you will need.
When you have crawled the sitemap file in Screaming Frog, you will want to order the pages/links by Status (hit once on the Status Code column header). When you get a 200 response code all is fine. When you get a 301 it means the resource is moved (redirected). If any 404s show up, that page is broken and you need to fix it (correct the link listed in the file).
Sitemap Plan
— Analysis