Signing up for a simple web hosting package will usually buy you a defined block of resources on a single server: this much web space, that much bandwidth, maybe a set amount of RAM or CPU cores.

While this works well for many websites, having fixed resources can be a problem for larger projects. There’s generally no way to temporarily allocate extra RAM or bandwidth if you experience an increase in traffic, and even a simple plan upgrade might require your website to go offline for a while.



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