Cloudflare is a network of servers around the world that people connect their sites to in order to increase their loading speed and protect against DDoS attacks. Also, using this service, you can manage DNS records on the domain and transfer the site to HTTPS. Cloudflare https://hostovita.pl/cloudflare/ has a free plan and several paid ones. Depending on the tariff, the level of protection and the possibilities for speeding up the site will differ.