Content Delivery Networks (CDN): Good or Bad for SEO?

A big yes, CDN is good for SEO as it's ranking factor. It reduce the load time of website and make website fast.

You can use cloudflare for high performance website.

So CDN is good for SEO.

Besides creating amazing content, building backlinks, and creating social signals; speeding up your website is a great way to help Google index and rank your site faster. Implementing a content delivery network (CDN) can be an easy way to see faster speeds and actually help improve your SEO.