Question

What is the most likely significance of the tagline “The Greatest Snow on Earth”?

Answer 1

The likely significance of the tagline “The Greatest Snow on Earth” would be that "It is a play on the words “The Greatest Show on Earth,” suggesting that the snowfall is so spectacular it is like a performance," since this is a very well-known and recognizable phrase. 

Answer 2

Answer: It is a play on the words “The Greatest Show on Earth,” suggesting that the snowfall is so spectacular it is like a performance.

It is likely that this phrase is intended as a reference to the phrase "the greatest show on Earth." The effect of comparing the snow to a show is to imply that the snowfall is as spectacular as a good performance, or that it should be appreciated in the same way.