It's best described by an example:
- Twitter @A tweets: "I am a rabbit"
- Twitter @B replies: "@A how sad it is"
The goal is to make the Tweet from @B to public so every follower of @B would see even if they are not following @A. Normally @B would Tweet like this:
".@A how sad it is"
(note the dot).
Otherwise only those who follow both @A and @B would see that reply.
It would be just like a Re-Tweet but your own Tweet.
How to achieve this?
Best Answer
These tweets are always public. Anyone can see them anytime. But Twitter website is not built to show @B's replies to @A on the home timeline if they are not following @A. But there are Twitter clients that does it. I remember TweetDeck having this feature. It'd show the followers of @B all of his tweets and replies to @A even if they are not following @A.