Can someone help me understand this advice from RHS?

[IStillMissBlockbuster]

www.rhs.org.uk/Plants/131374/Rubus-Tayberry-Group-(F)/Details How can this be best in full sun but also good for a north facing wall?

It means it can survive and produce fruit in the cold and shade of a North facing wall. However you will get better and more abundant fruit in full sun. Many fruit bushes will produce no fruit on a north facing wall.

It means that the aspect doesn't matter, it will grow whichever way it faces, but it also says it needs to be sheltered. So an exposed north facing wall that gets hit by the full force of the winter elements wouldn't be any good for it, but a sheltered north-facing wall would be ok.

Ok, thank you.