Leads the orchestra
The conductor leads and guides the orchestra to keep in time and everything.
the leader of an orchestra can either be called a concerto or a conductor.hope that answers your question!
I'm assuming that you mean the concertmaster, or the person in the first chair of the first violin section in an orchestra. The concertmaster is the most violinist in the orchestra and leads the section. He makes decisions about bowings, fingerings, and playing style for the 1st violins. In a concert, the concertmaster emerges just before the concert begins and takes a bow on behalf of the orchestra. He also leads the orchestra in turning and is responsible for playing solo sections in orchestral music.
That would be a conductor.
Usually it's the principal oboe. In case of a piano concerto, the orchestra will tune to the piano.
A conductor leads the orchestra with a baton.