A spokesman is a person who speaks for a group or an organization.
A spokesman is someone who talks for others and tells people what the group thinks or wants.
Examples:
The spokesman for the company talked to the reporters.
The spokesman said the group was happy with the decision.
The spokesman always wears a suit when he talks to people.
The dog was the spokesman for the other dogs.
The spokesman for the aliens told us they come in peace.
The spokesman's job is to talk to people for the group.