viral loop
noun [ C ] business specialized uk/ˌvaɪə.rəl ˈluːp/ us/ˌvaɪ.rəl ˈluːp/
病毒式营销
a method of making a product become very well known quickly, by people sharing information about it online, on social media, etc.
Viral loops have emerged as perhaps the most significant business accelerant to hit Silicon Valley since the search engine. 病毒式营销可能已经成为自搜索引擎问世以来袭击硅谷的最重要的商业催化剂。