What suggestions would you offer a new employee to help them effectively communicate with your team and/or teams in your workplace when meeting face-to-face, sending an e-mail, and during a team meeting?

I'd advise them to listen first. Be willing to learn.

Then, be friendly and polite.

Ask questions when necessary.

Use appropriate grammar, spelling, and punctuation when communicating in writing.

Always convey your thoughts clearly and succinctly.