Yes – its about getting rid of the “residue” that is left behind.
Most people will use the Programs and Features in Windows to uninstall software that they no longer use , however this will leave behind ” residue ” in the computer in the program files and in the registry.
The same applies to the Mac with some of the program being left behind.
That is why I recommend the following programs.
Windows computers – Geek Uninstaller – The Free Edition – this also comes with a force removal which you can use when ” certain ” programs will not uninstall
Mac computers – App Cleaner