It is a virtual server that uses resources in a shared way in a larger system within our cloud.

When the application you run demands flexibility or simply has very specific requirements not available in shared hosting, a cloud server is for you.
Similarly, if you need to have the ability to scale the size of your system available in the face of growing demand from your users, you need a server in the cloud.
When you need to run your application in multiple locations at a reasonable price, your best option is a cloud server.

A node is an autonomous system that includes a number of resources such as RAM, disk space for storage and processing power (measured in the number of cores). We have nodes of different sizes available, depending on the capabilities your project requires.

This will depend on several factors, including the minimum requirements of the application you intend to execute (consult your developer), the load or demand you expect to receive (for example, number of simultaneous users or visits per hour) and the processing capacity that will give you the expected loading speed and execution.