noun
must-buy product; recommended purchase
A product or item that is highly recommended to buy, often used in marketing or consumer advice contexts. Not to be confused with the American electronics retailer Best Buy.
from English best buy
この掃除機は今年のベストバイだ。
This vacuum cleaner is this year's must-buy product.
雑誌が選ぶベストバイ10選。
The magazine's top 10 recommended purchases.