This is the 1898th most frequent Polish word.
prowadzący
"Host" or "leader."
The word 'prowadzący' is used here as a noun to refer to the host or presenter of a TV program.
Prowadzący program telewizyjny świetnie radził sobie z pytaniami od widzów.
The TV show host handled the viewers' questions excellently.
In this sentence, 'prowadzący' functions as an adjective describing the car that is leading the convoy.
Samochód prowadzący cały konwój zwolnił przed rondem.
The leading car of the convoy slowed down before the roundabout.
Here, 'prowadzący' is used as a participle in its present form to describe the manager who is leading the meeting.