John Gill Commentary John 6:2

"And a great multitude followed him, because they beheld the signs which he did on them that were sick." — John 6:2 (ASV)

And a great multitude followed him
From several cities and towns in Galilee, where he had been preaching and working miracles:

because they saw his miracles which he did on them that were
diseased ;
so that it was not for the sake of his doctrine, or for the good of their souls, they followed him; but either to gratify their curiosity in seeing his miracles, or to be healed in their bodies, as others had been.