In the NFL, the importance of a playbook is self-evident, and can even be said to be the core. The league has established many rules to help teams keep their strategies secret.
However, it is now the era of smartphones and social networks.
Everything is difficult to guard against. Fans may unconsciously record and share content from open team practices, leading to leaks of strategies.
Because of this, all thirty-two teams have formed media monitoring groups to continuously review and observe social networks and content published on knowledge-paid platforms to avoid leaking team secrets.
Despite this, once the season begins, from the preseason, all game footage will be archived by the league and regularly uploaded. All teams in the league have access, which means keeping strategies secret is nearly an impossible task.
