• You can set a Global Auto-Delete Timer for all new chats and groups you create.
• New messages will be deleted after 1 day, week, month - or a custom duration you choose.
• The new menu in Settings > Privacy & Security > Auto-Delete Messages also lets you set up Auto-Delete for any of your existing chats faster.
• Admins of groups with 100+ members can organize discussions into separate topics.
• Topics now have a two-column layout that keeps recent chats easily accessible as you browse topics.
• Previews of topic messages in the chat list work like a button - click to jump to the last updated topic.
• Up to 5 topics can be pinned to the top of the list.
• Each topic now supports multiple pinned messages.
• The View as Messages mode now shows which topic each message belongs to.
• Badge counters for topics you never opened will have a lighter, less distracting color.
• A new General topic is now included by default, containing service messages and the earlier message history from the group.
• Admins can rename the General topic.
• Large groups can enable Aggressive Filtering in Manage Group > Administrators to remove more spam with automated algorithms.
• Admins help improve filtering by reporting any false positives in Recent Actions.