If you were alive in the late 60s and all of the 70s, you were fed industry folderol about new bands constantly. That was the old way.
There were no zines, no alternative press (unless its origins were political), and no internet. Obs.
But there was radio promotion, touring, and the rock press, which was just beginning to take the music and the artists seriously, if you can believe that. And making lots of money selling ads against its content. No grousing about that, just the observation that one of the reasons things blew up after the Beatles showed everyone how is that small industry became a big one for a while, and while doing so it got the feel of being something new.
I’m sure I learned of Quicksilver listening to this great song on the radio. They have some other good ones, and seem from this vantage to be one of the better more forgotten bands in our history.