[[Domain Name|Domain Names]] are the base names of websites, such as [example.com](http://example.com) or [obsidian.md](https://obsidian.md/). It is the foundation for coordinating your other web services, such as hosting content (i.e. the actual web pages people see when they go there) and exchanging emails (e.g. sending and receiving email from [email protected]). ^about There is of course far more depth and complexity to it than that; the entire modern world runs on them, and it requires many very smart people to keep it running. But that's the everyperson gist of why you deal with them and what you might need one for.