Cloudflare is among the most solid CDNs out there and has a considerable amount of data centers. To utilize Cloudflare for your child site, you first need to change the domain’s DNS name servers to use the Cloudflare name servers. Now that your child site is using the Cloudflare name servers (which you can check from DNS Checker), the next step is to set DNS and enter the site domain. Cloudflare will show orange arrows for the domain in DNS, which means Cloudflare will be used. Cloudflare also has an option to check that the name servers are being used.
Your MainWP Dashboard will work with almost any host but we recommend: