The correct platform is:
1. Twitter (now called X) introduced ’Circles’ as a feature allowing users to create private groups of up to 150 people for sharing tweets.
2. This feature was designed to enable more intimate sharing compared to public tweets.
3. The announcement was made in 2022 as part of Twitter’s efforts to enhance user control over content sharing. While Instagram has similar features like ’Close Friends’, the ’Circles’ feature specifically belongs to Twitter.