You can add all HTML meta tags here and you can use the meta method in each of your routes. If a route does not have a meta method, the root.tsx meta values are used.
in the <head> of you App() method in root.tsx would work the same way as it would in any HTML or React project.
sitemap.xml
Open any sitemap generator like https://www.xml-sitemaps.com/ and enter your site’s URL after deployment. Add the output to the content variable of the routes/[sitemap.xml].tsx file. This helps search engines to index the pages of your site.
robots.txt
A default robots.txt file is already added at routes/[robots.txt].tsx which you can customize as per your needs.
SEO Best Practices
It’s important to follow SEO best practices for you product to rank on search engine results. Here are some links that will help you: