AWS publishes six advantages and the exam quotes them almost verbatim, so it is worth knowing them as phrases rather than as concepts you can paraphrase.
Trade capital expense for variable expense
You stop buying servers ahead of demand and start paying for what you consume. The exam wording is “capital expense” and “variable expense”, not CapEx and OpEx.
Benefit from massive economies of scale
Aggregate demand across all AWS customers produces lower per-unit prices than any single organisation could negotiate.
Stop guessing capacity
Capacity planning becomes a runtime decision rather than a procurement one. This is the advantage most often confused with elasticity in questions.
Increase speed and agility
New resources are minutes away rather than weeks, which changes what experiments are worth running.
Stop spending money running and maintaining data centres
Racking, cooling, and physical security stop being your problem.
Go global in minutes
Deploying into additional Regions is a configuration change, not a project.
A note on the update
This part was revised after the CLF-C02 refresh reworded the fourth advantage.
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