Keyboard shortcuts are keys or combinations of keys that provide an alternative way to do something without mouse that you’d typically do with a mouse.
Windows + R will show you the “RUN” box where you can type commands to either pull up a program or go online. The Windows key is the one in the middle of CTRL and ALT on the lower left side. The R key is the one that is located between the “E” and “T” key. Hope that helps.