Cloud services refer to the on-demand delivery of IT resources over the Internet with pay-as-you-go pricing. Instead of buying, owning, and maintaining physical data centers and servers, you can access technology services, such as computing power, storage, and databases, on an as-needed basis from a cloud provider.There are several major cloud service providers. For instance:

1. Amazon Web Services (AWS): AWS is the world’s most comprehensive and broadly adopted cloud, offering over 200 fully featured services from data centers globally. AWS has significantly more services, and more features within those services, than any other cloud provider–from infrastructure technologies like compute, storage, and databases–to emerging technologies, such as machine learning and artificial intelligence, data lakes and analytics, and Internet of Things.
2. Microsoft Azure: Azure is another major player in the cloud services market. It offers a wide range of tools for building, shipping, and scaling AI solutions using the latest AI models. Azure provides sophisticated vision, speech, and language AI models and allows you to create your own machine learning models.

These cloud services help lower costs, increase agility, and foster innovation by allowing businesses to experiment with the latest technologies. They also offer high levels of security to satisfy the requirements for the military, global banks, and other high-sensitivity organizations.