When you create a segment, by default it is only visible to yourself. If
you want other people to be able to use it, you need to "share" it with
them. You can do this in the components menu on the left by right
clicking the segment, click "share", and then select the users you want
to share it with. You can also click components at the top, go to
"segments", and select multiple segments from the list to share at once.
Publishing the segment isn't required unless you want to use it in
multiple pl...