As a PRO level member, I use Vimeo to embed videos into my own website, as well as providing videos to clients for review. As a long time user, early on Vimeo blew competition out of the water being affordable and customizable, and it remains true today. Since then they've added so many features that I use it for client review, and delivery of final videos. I was able to cancel a different monthly membership because Vimeo added the same features I was paying a different platform $15/month for.
The analytics options are huge. Although I dislike some the changes that have been made to this feature, it's still very valuable and provides insights to how my website is doing beyond typical web analytics.
There are other features I use--creating showcases, licensing music, and being listed in the "for hire" section--but those are less important to me. Vimeo is also my go-to website when looking for inspiration or industry related tutorials. Review collected by and hosted on G2.com.