A virtual computer is like having a PC in a PC, in other words, having 2 systems independent from each other that you can use in the PC, including applications, file systems, etc.
VMware Player is a program that lets you run a virtual computer in your system, giving you two systems where you normally have only one.
VMware Player lets you carry out all of the common tasks, such as using the internet, opening CDs and DVDs, sharing folders, moving data, all with the possibility of setting memory parameters and options to allow or not allow certain actions.
This version has a long list of corrections, changes, and new developments that significantly improve functioning.