Social media is an effective channel for your product update announcements. It serves to own user niche and helps to increase your brand visibility. To use this channel efficiently, you have to use all its resources, and a social thumbnail is one of this resources. It increases the visibility, reach, and CTR of the announcement.
With this update, when you share a link to your announcement on social media, you'll have an auto-generated branded social media thumbnail.
Or, if you like, you can upload your own created social media thumbnail.