The smartwatches vibrate and display "GOAL" when a team makes a score in the match. The signals are sent to the smartwatches via a system developed by a company called GoalControl. Their system places seven cameras each, recording 500 frames a second, around both goals. When a ball goes through the goal line, the cameras record it and the system sends a signal to the smartwatches.
The technology is supposed to make lives easier for officials on the ground. In a match between England and Germany during the 2010 World Cup, a referee ruled incorrectly that a goal made by England's team was not valid. That ruling may have cost England the match and since then the FIFA organization has been testing the goal detection system made by GoalControl in an effort to avoid a similar issue in this year's tournament.
What do you think about this new technology being used in the world's biggest sports tournament and do you think it will help or hurt the game in the long run?