Reach and engagement are problems these days. Many social platforms promote things they can inject ads on. E.g. a Facebook post will get a wider audience than simply posting a link to your FB feed. Same on linkedin. Same on twitter. They are optimized for keeping traffic inside their platform. They'll run your content but not necessarily bubble it up in other people's feeds.

Medium is not a great platform for distribution compared to that (poor reach and it never really emerged as a destination) but not worse than other external/self hosted blogs. A good strategy if you are hungry for clicks is to target all of them with content appropriate to the platform and a link to your blog for reading more. By appropriate I mean optimized for the attention span of the reader. So short tweet on twitter, executive summary on Linkedin for those poor people with essentially no attention spans and an aunty friendly version for Facebook. Reddit post and HN link if you feel brave ;-). I've also been targeting dev.to.