This is the 11707th most frequent Russian word.
завезя
The word "завезя" is a participle in Russian, meaning "having delivered" or "having brought (by transport)."
In this sentence, "завезя" is a gerund describing the action of delivering goods that precedes the store starting its promotion.
Завезя новые товары, магазин начал акцию.
Having delivered new goods, the store started a promotion.
Here, "завезя" is used to indicate the manner in which he surprised everyone — by delivering exotic plants.
Он удивил всех, завезя множество экзотических растений.
He surprised everyone by delivering many exotic plants.
In this example, "завезя" denotes the completion of the action of delivering the car before he left for home, emphasizing the sequence of events.