A public cloud works by using a shared pool of computing resources—such as servers, storage, and networking—provided by a third-party cloud service provider over the internet. These resources are hosted in the provider’s data centers and made available to multiple customers on a pay-as-you-go or subscription basis.
Features of a public cloud include:
Infrastructure and virtualization. Public cloud providers operate large data centers with thousands of servers. Using virtualization technology, they divide these physical resources into virtual machines (VMs) or containers, which are allocated to customers based on their needs.
On-demand access. Users can access cloud services via a web-based interface, APIs, or command-line tools. They can quickly scale resources up or down, depending on workload demands.
Multi-tenancy model. Multiple businesses, individuals, or organisations share the same underlying infrastructure, but each customer’s data and applications remain isolated for security and privacy.
Pay-as-you-go pricing. Customers are billed based on usage, such as computing power, storage, bandwidth, and additional services such as AI tools, databases, or analytics.
Managed services and security. The cloud provider handles maintenance, updates, and security measures, including firewalls, encryption, compliance certifications, and backup solutions to protect customer data.
Global accessibility. Public cloud providers often have a network of data centers across the world, enabling customers to deploy applications and access data from anywhere with an internet connection.
Key services in a public cloud include: 
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