Line movement is crucial in sports betting because it can indicate where the majority of bets are being placed and how oddsmakers are adjusting the lines in response to this betting action. Sharp bettors often look for line movements as they may reveal valuable information about the game that isn't apparent at first glance. For instance, if a line moves significantly, it could be due to new information such as player injuries, weather conditions, or other factors that could impact the game's outcome. By tracking line movement, bettors can attempt to get the best value before the odds change too much.