This is the 14621st most frequent Russian word.
передового
"Передового" means "advanced" or "cutting-edge" in English.
Here 'передового' characterizes the robot as being advanced, leading-edge, or innovative.
На выставке представили передового робота.
An advanced robot was presented at the exhibition.
In this sentence, 'передового' is used to describe a scientist as being progressive and at the forefront in their field.
Идеи передового учёного вдохновили многих.
The ideas of the advanced scientist inspired many.
Here 'передового' refers to the level of knowledge as being superior or advanced.