Personal Hosting is what I call it when I have my own domain name setup to point to a personal instance of a piece of web software (for example, Matrix). It differs from self hosting because that would require me to also physically own the instance machines, which I do not, since I host mine on Linode.

While that's a very minor distinction, it's still kinda matters. There's good reasons to self host, most notably that the hardware is much cheaper in the long run and doesn't incur a monthly cost, as well as the fact that messing around with the hardware itself can be quite fun. I used to self host all of my stuff but it became quite painful to manage, as my home internet isn't structured around this capability.