#dnspub enables instant global DNS resolution (except for Turkey) of your npub info. If you have published a kind 0 event for your [npub], the corresponding URIs become globally available within seconds (except for Turkey)

_nip05.[npub].npub.dnspub.xyz
_lud16.[npub].npub.dnspub.xyz
_nip05.[npub].npub.dnspub.xyz
_name.[npub].npub.dnspub.xyz
_display_name.[npub].npub.dnspub.xyz
_website.[npub].npub.dnspub.xyz
_banner.[npub].npub.dnspub.xyz

Why is this a big deal? DNS is baked in at the OS level, so without any additional software, it's possible to find out info about any npub. For example, the npub of Lyn Alden - resolvable everywhere (except for Turkey)