A modern programming language that makes developers happier.

kotlinlang

People are asking you nest follow-up messages to your original post in a thread. Otherwise every top-level message would trigger a separate notification for people who subscribe to the channel.

It is a way to suggest that your post might have been better as a quick intro sentence and then explain more details (like code snippets or more links) inside a <https://slack.com/intl/en-fi/help/articles/115000769927-Use-threads-to-organize-discussions-|thread> to avoid having big posts in the channel.
(Also avoid using `@here` in a channel with almost 27k people)