1)Admin wizard to add an entity to the Portal
2)App Module, App Designer, and Sitemap Designer enhancements
3)Conversation view for private messages and Twitter replies
4)Engagement History contains user information
5)Listening and engagement on LinkedIn Organization Pages
6)Listening and engagement on YouTube
7)Microsoft Social Engagement user interface is now available in Japanese and Chinese
9)New recommendation type in Social Selling Assistant: Get Insights
10)NOT IN support for Advanced Find
11)Portal interaction tracking
12)Portals German Sovereign Cloud support
13)Power BI content pack for Social Engagement
14)Prospect to cash integration of Dynamics 365 for Sales and Dynamics 365 for Operations
15)Security enhancements: User session management
16)Sell more with Social Selling Assistant
19)Support Azure AD-B2C for Portal authentication using a single sign-on (SSO) configuration
20)Support timezone independent date formats in Portals forms
21)Use Virtual Entities to integrate external data at runtime
I hope this helps
Happy Day..