virality

uncountable usually

(advertising, marketing) The state or condition of being viral; tendency to spread by word of mouth.

Japanese Meaning

口コミやインターネットを通じて急速に広がる性質 / バイラル性、情報が自然に広がる傾向

The campaign's virality surprised the team, leading to a sudden spike in brand awareness.

そのキャンペーンのバイラル性にチームは驚き、ブランド認知が急上昇した。

Sense（1）

(advertising, marketing) The state or condition of being viral; tendency to spread by word of mouth.

The point is virality—content so outlandish that people can’t help but talk about it.

viralities

（ plural ）