Usually identifier name is kept short and lowercase, while display name (title text) can be slightly longer and more descriptive. See !askouija@lemmy.world for example.

The real name should be as easy to remember and type as possible. Sometimes I don’t remember if a name had an underscore between the words or how it was exactly worded, which is bad. !climate@slrpnk.net has a crazy long display name that for some reason contains a whole description, but the actual name is easy to remember.