2018-08-10 UTC
# 
@ReBeccaOrg ↩️ Essentially you publish a URL that folks can POST (or the like) to which tells you that they did the equivalent of retweeting you, replying to you or faving you.
And as @callahad said, WebMention is the latest iteration... https://indieweb.org/Webmention (twitter.com/_/status/1028067345753759744)