Since my main use of Hive is its social aspect, I will focus on that part. I would tell him that Hive is the place where you can express yourself freely. Like a conventional blog, but where users own our content and we don't have to pay for storage. I would add that, in addition, there is a whole universe behind it in which to immerse yourself, from games to finance.
!PIMP
That's a point that a lot of people don't realize. Having a blog or another web presence is normally not free...