For the first time, Snapchat users can use their Snapchat ID to log into another media platform. With the acquisition of Bitmoji a few months ago and recent integration of the two apps, Snapchat users can use their ID to use Bitmoji and create their own emojis.
Bitmoji is an app that lets users create emojis that are styled to look like them. With Snapchat's acquisition of Bitmoji, Snapchat users can use their Bitmoji-crafted emojis in their photos or conversations on the social media app. Instead of merging the two platforms together, users still have to download Bitmoji to create their emojis, but can use the emojis on Snapchat.
While logging in with a Snapchat ID on Bitmoji is not unexpected since the former owns the latter, it is possible that this is just the start of being able to use Snapchat to log into other platforms.