At some point every product owner wonders how to make their product go viral, as a thought experiment. Viral products are rare and sustainable businesses built on viral promotions even rarer. Even successful products like Dropbox had a viral factor below one due to various factors such as excellent product/market fit, daily usage, high retention, and incentivised sharing. Understanding the sharing mechanism is crucial, which involves a lossy process where not everyone shares, not every share is seen, and not every click results in a new user. This process must transcend devices, platforms, screen sizes, and more to be effective. Defining a clear sharing mechanism is key, involving identifying all meaningful shareable events in the product and sharing across multiple platforms, such as social media, to maximize reach and network effects.