Key Properties (What You Get)

• Automatic scaling: from zero to thousands of concurrent executions.
• No server management: OS/security patching, capacity planning handled by provider.
• Event-driven: functions triggered by events (HTTP, queues, schedules, storage changes).
• Granular billing: billed by ms and memory/CPU allocation (provider-dependent).

Important constraints: functions are typically stateless, have execution time limits, ephemeral filesystems, and may suffer cold starts.