Explain what is known and reported in the literature and what are the gaps in what is reported in the literature?

Essay paper: How does VAR work as a remote decision support system for on field referees in association football.

Address the following:

What is the problem / issue that you are studying or what is the situation that you are investigating?

What is known about the topic in the literature, including the theoretical background to the study?

Explain what is known and reported in the literature and what are the gaps in what is reported in the literature?