"Gravlax on advert" refers to the popular Three UK 5G network campaign featuring a man using his phone to look up what gravlax is in a restaurant to impress his in-laws, highlighting real-life uses of fast internet for everyday situations. The ads, created by Wonderhood Studios, show the man quickly transported to a Swedish lake to learn gravlax is salmon cured with salt, sugar, and dill, leading him to confidently order it.

This is the SOLE reason why anyone, including Mike, know what gravlax is, unless of course, you're Sweedish🙏🏻.