noun
word of mouth; personal recommendation
Traditional face-to-face sharing of information, opinions, or recommendations among people.
See also: マスコミ
この店は口コミで人気が出た。
This shop became popular through word of mouth.
noun
online reviews; user comments
Refers to reviews, ratings, and comments posted on the internet about products, services, or businesses.
ホテルを予約する前に、口コミをチェックした。
I checked the online reviews before booking the hotel.