How is the Users Flow different to the Transition report?
Transitions only shows you how often a page was viewed and where they went to after, but not at which position a page was viewed how often and how users navigated through your entire website or app over multiple steps.
Also while the transition report shows only paths for one URL, the Users Flow shows you lots of paths your users took over several pages over several steps. It also adds more features like being able to use it in Scheduled Reports and with the Matomo Mobile app which Transitions can’t do.