also: ポピュラリティ
noun
A straightforward loanword from English, used in the same sense as the English word. Common in media and casual contexts.
その歌手のポピュラリティーは急上昇した。
The singer's popularity skyrocketed.
SNSでポピュラリティーを得るのは難しい
It's difficult to gain popularity on social media.