What is Smash Hit?
1.
something that is very successful
It was hard to believe that this video game was already a smash hit and that it was released only recently.
2.
one of many vague, nebulous, meaningless marketing hype phrases with no prerequisites, rules or regulations required to differenciate between them.
see: hit, break-out/thru, smash.
they imply that the product is already in some way "successful" & therefore is deserving of your attention, because you the consumer are a follower & couldnt possibly find something interesting on your own unless thousands or millions or others had already experienced it & said it was worth your valuable sheeple time & interest.
After a decade long career, selling millions of albums and touring the world several times over, the band finally had a 'smash hit' that went to number 30 in the charts.
See