OpenPGP WKD for easy PGP key discovery

Web Key Directory (WKD) “is a standard for discovery of OpenPGP keys by email address, via the domain of its email provider”. In short, through some DNS and files-on-your-webserver conventions, some email clients (e.g. Thunderbird or ProtonMail) and tools like GnuPG are able to retrieve your PGP keys automatically. This is of course super convenient and desirable for your correspondents, because PGP encryption is hard enough as it is. OpenPGP makes this even better by offering “WKD as a service”, which means you only have to do the DNS bits, and not the files-on-your-webserver bits.