This was very big in an ad campaign at least last year, I'm not sure if it still is, with the little butterfly.

它的广告宣传做得很大，至少在去年是这样的，我不确定它现在还是不是，它这里有一个小蝴蝶。

麻省理工公开课 - 化学原理课程节选

or an ad campaign if you are working in advertising

或者一个广告活动，如果你在广告界工作，

英国的影视产业 - SpeakingMax英语口语达人