Cloud Platforms, Explained (AWS / GCP / Azure)

What 'the cloud' actually sells, the handful of building blocks that matter across AWS, GCP, and Azure, and how to stay sane about bills, permissions, and lock-in.

1. What "The Cloud" Actually Sells The cloud rents you computing on demand - compute, storage, network, and managed services - instead of making you own servers; you pay for what you use, and the big three are the same shape with different names.
2. The Building Blocks (Across Vendors) The handful of cloud pieces that actually matter - compute (EC2/Compute Engine/VMs), object storage (S3/Cloud Storage/Blob), managed databases (RDS/Cloud SQL/Azure SQL), networking (VPC), and identity (IAM) - explained once and name-mapped across AWS, GCP, and Azure.
3. IaaS vs PaaS vs Serverless, and Staying Sane The spectrum from raw VMs (IaaS) to managed platforms (PaaS) to functions (serverless) - more managed means less control and less ops - plus the three gotchas that actually hurt: surprise bills, IAM complexity, and lock-in.