Wine stands for 'windows emulator' and is a utility to make most of the
aspects of windows available to windows apps so they will install and run
within Ubuntu. It's not perfect and won't work with some apps but it's worth
trying.
For the apps that won't run on Wine there is virtualbox and similar
utilities which actually run a full copy of MS windows within Ubuntu. Of
course too have to supply the Windows disk and this requires a much larger
amount of disk space and memory.