How important is it for captains to speak to players about their roles in the team or should players know their roles?

Communication is such a powerful ingredient for good captaincy.
We all like to feel a sense of belonging in life and playing in a cricket team is no different. People like to know how they can contribute and knowing their roles creates the clarity of what they need to do to prepare so they give themselves the best opportunity to execute their skills and help the team.
There’s more to a role in a team to just scoring runs, taking wickets, catches and run outs.
For example, most batters like to know where their batting in the order days in advance (not the night before or 5 minutes before play starts) as they can prepare, think through/visualise their innings, what their role is and how they’d like to play.
As a captain, at any level of the game, please don’t take it for granted each of the players in the team will know their role. A quiet word of clarity and encouragement can make a significant difference for all.