What is word of mouth phenomenon? Obsession 2025 film?I need...

Prompt

What is word of mouth phenomenon? Obsession 2025 film?I need extreme deep research on this phenomenon how it actually works and how can we include this to anything we produce, projects specially films.., take your time do your deep research on everything this phenomenon taken place in history ever.. and what are the things that common highest grossing films in world history overall and different countries , take your time… i need research on every single aspect of this phenomenon and i also wants to know is there any other phenomenons exists for similar extreme successful projects deep research and find them too and list them all, take your time