A service such as Cloudflare can sit between visitors and the origin server, providing authoritative DNS, caching, TLS handling and selected traffic filtering. This can reduce origin load and improve delivery for cacheable content.
What to consider
The origin server still needs strong security. Restrict administrative access, keep applications patched and configure SSL correctly between the edge and the origin so encryption does not stop at the proxy.
Changes to caching, firewall rules or bot controls should be tested carefully because aggressive settings can block legitimate visitors or interfere with login, checkout and API endpoints.