Understanding the home-field advantage in the NFL requires looking at several factors. It's not as simple as determining whether teams perform better at home or away. Schedule, player performance, injuries, team preparation, and even weather can all play significant roles.
Indeed, there can be periods when the home-field advantage doesn't seem significant at all. Based on NFL data analysis, over the past two decades, home teams have won about 57% of their games. However, this percentage has been declining in recent years. In 2019, home teams had a winning percentage of only 52%, displaying a decrease in the strength of home field advantage. In 2020, with the impact of the COVID-19 pandemic that restricted or in some cases completely negated fan attendance, the home-field advantage was diluted further and statistics shows that home teams won even less than 50% of games.
While team skill and resilience play an essential part in every game, studies show that crowd noise also contributes to the home-field advantage. This effect can be traced to multiple factors - the visiting team having trouble hearing their play calls, or the psychological impact of facing a decidedly unfriendly crowd. However, with advancement in technology, strategic game planning and improved player preparation, these effects have begun to minimize.
In a nutshell, while the home-field advantage is still a factor in the NFL, data suggests it's becoming less significant in determining a game's outcome, especially in today's unique circumstances. It will be interesting to track the stats as the world returns to normalcy post-COVID.