Self-hosting is the practice of running and maintaining a website or service using a private web server, instead of using a service outside of someone’s own control. For example, someone wishing to write a blog could use hosted blog services. Alternatively, they could install content management system software on their own server to self-host their blog.
Motivation to do so could be as simple as saving costs by combining several services on a single machine or VPS instance, or in most cases the privacy benefits of being more in control – or in complete control – one’s data and computing infrastructure. However, it could also be a hobby to people well-versed in technology.
Accordingly, there’s also a sizeable hobbyist community around self-hosting, made up of hobbyists, technology professionals and privacy conscious individuals.
– https://en.wikipedia.org/wiki/Self-hosting_(web_services)
Self-hosting is the practice of hosting and managing applications on your own server(s) instead of consuming from SaaSS providers.