what does it mean to be popular?

according to pinterest, eucalyptus is consistently among my most pinned images. people like it. its popular. i wonder, what about it makes eucalyptus more popular than say queen anne’s lace? or willow? or ferns? is it familiarity? or uniqueness? delicacy? or sturdiness? sentimentality? or universality? association? color? repetition?  beauty is interesting that way. in the way that it cannot easily be defined. how everyone agrees, but no one can explain it. how it changes over the decades. all i know, it that right now, in the early part of the 21st century, eucalyptus is popular.

dried eucalyptus