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Cloudflare is a cloud edge platform concept that provides DNS, CDN, security, workers, and edge delivery tools.
Cloudflare matters because many production sites depend on Cloudflare for routing, caching, and protection. It gives builders a precise word for the thing they are changing, debugging, reviewing, or shipping.
Plainly
Think of Cloudflare as part of the roads and power for the app. It gives one small job a clear name so the whole app is easier to understand.
In practice
Use it when local work needs to survive hosting, networks, caching, or production traffic. In practice, name the owner, input, output, failure mode, and proof before relying on Cloudflare.