Since the introduction of this technology so far this aspect of reviewing scenes during a match that the referee can't see is been spotted by the VAR if the attention of the situation is needed to check.
What is this VAR ?
The VAR also known as the video Assistant referee is a match official in association football who reviews decisions made by the head referee with the use of video footage and a headset for communication.
Since the introduction of this technology errors have been corrected but the question is, the technology is it 100% guaranteed to detect a particular scene in a match.
Few years back there was no special assisstant to help solve scenerio been displayed in a match whereas only the referee has the final say.
When Was It Introduced ?
The VAR technology was introduced in top flight European football by the German Bundesliga and the Italian Serie A at the beginning of the 2017–18 season. While the Spanish league (la liga) began theirs on the 2018–19 season.
Why Was It Introduced ?
The role of the VAR is to assist the referee to determine whether there was any misconduct in a match that means whereas a goal should be
awarded or not.
It also assist the referee in issuing card whether red or yellow to a player if such situation is not seen by the ref and also if a penalty should be awarded or not. All this will be notified using the VAR system.
In other words the VAR also helps in notifying the referee if a goal is scored offside or not.
Since the introduction of this technology it now makes errors in a match reduce compared to the matches played in previous years.
In conclusion the VAR can make a referee make better decisions during match.