Instagram introduces Threads to message close friends

As part of its plans to integrate its messaging services, Facebook has introduced a new app from Instagram that makes chatting with close friends seamless.
Called Threads, the standalone camera-first messaging app allows you to share photos, videos, Stories, with close friends from Instagram, the official release notes.

Although Threads will be a standalone app, messages from close friends will also be visible in the main app's Direct section. Threads is available globally.