Dave Rodriguez
mostly sites built using React,Vue or Anugular are csr.
While all the other sites using old MVC approach (django,rails,etc) uses ssr.
I validate it by checking the meta tags in the site using https://metatags.io
If a site have dynamic meta means different meta for different pages , most probably its ssr.
See hashnode is built using react(nextjs). but it uses ssr.