Self-hosting refers to digital services that you can host on your own personal servers rather than relying on some software-as-a-service provider to host them for you. The server you use for hosting might be a physically-owned server or a virtualised one in, say, AWS, but the important thing is that you have full control over it which grants you a level of independence from other service providers.
I’m fairly new to the world of self-hosting but I am proudly hosting this wiki and my personal website on a Raspberry Pi at home, given the low traffic they receive. I wrote a blog post about how I set that up.
Here’s a list of some software that is suitable for self-hosting that I intend to add to over time: