What does it mean for a player to be a healthy scratch in a hockey game and how does it impact the team's overall performance?

When a player is a healthy scratch in a hockey game, it means they are physically able to play but are not chosen to be in the lineup. This decision is typically made by the coach based on various factors like performance, strategy, or team dynamics. The impact on the team's overall performance can vary, as it may affect the team's depth, chemistry, or specific game plan for that match.