This is the 10486th most frequent Russian word.
взлетела
"Взлетела" - "took off" (past tense, feminine).
In this case, 'взлетели' describes a significant increase or rise, often quickly or unexpectedly.
Цены на недвижимость взлетели в последние месяцы.
Real estate prices have soared in recent months.
This usage of 'взлетел' refers to the physical action of taking flight.
Самолет взлетел рано утром.
The airplane took off early in the morning.
Here, 'взлетела' is used metaphorically to indicate rapid improvement or success.