Cloud computing refers to the delivery of various services over the internet, including storage, computing power, and applications. Instead of owning and maintaining physical servers, businesses can leverage cloud providers' infrastructure, allowing for flexible scaling, cost-efficiency, and remote access to resources.

Cloud computing offers numerous benefits, such as cost savings by eliminating the need for physical hardware, scalability to accommodate growing business needs, enhanced collaboration through remote access, disaster recovery solutions, and improved security measures implemented by cloud providers.

Security in cloud computing is a top priority. Cloud providers implement advanced security protocols, including data encryption, access control, and regular security audits. Businesses can further enhance security by following best practices such as strong password policies, multi-factor authentication, and regular updates to software and security policies.

Cloud migration is the process of moving data, applications, and other business elements from on-premises infrastructure to a cloud environment. This can involve transferring all or part of an organization’s digital assets to the cloud, ensuring better scalability, performance, and cost-efficiency.

Cloud computing services are generally categorized into three types: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). IaaS provides virtualized computing resources over the internet, PaaS offers hardware and software tools over the internet, and SaaS delivers software applications over the internet on a subscription basis.