Medium frees a writer up to focus on writing, not maintaining a website or blog. And it has a built-in audience. Two incredible benefits. Not everything works on Medium though. I write guitar equipment reviews on my website and they get thousands of views each month. But they would tank on Medium. I wrote a few music related stories on Medium and I heard crickets chirping. You have to find what works here. Then it is great. I have neglecting my website since I started on Medium.