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Cloudflare caches static resources, like images, in order to reduce the load on your origin server and speed-up loading times for your visitors. Furthermore, Cloudflare protects your sites against DDoS attacks.
Cloudflare does many more things than that, but I’d guess those two are probably the most relevant to you.
I’d definitely recommend you keep Cloudflare enabled
Ahan Got it now … Thanks you for your kind responses
One more question please, Then what’s the difference between Free Vs Paid?