First of all, this is really a very poorly titled record album. It had nothing to do about being on tour. It is actually their first compilation album on Decca, their American label. When this came out in 1968, the way that songs were released was a bit different than later, but it looks like, in the digital age, we are sort of returning to the older ways.
Back then, the single ruled (actually, they were doubles, 45 RPM vinyl pressings with an “A” side (the “good” song) and a “B” side (the ugly cousin)). That ceased to be the norm after around 1969 or so, when the album started to dominate and singles were released in accordance with how well specific tracks on the album got airtime.
In any event, this is a compilation from many singles the The Who had released over several years. It had a companion in the UK, and we shall discuss that presently.