Typing indicators are an optional indicator to see and share when messages are being typed. They appear as animated dots and can be enabled or disabled at any time.
You and your contact must have this feature enabled to see this status.
How do I enable or disable typing indicators?
Signal Settings > Privacy > Typing Indicators
What happens when I disable typing indicators?
Your contacts will not see when you are typing, and incoming typing indicators will not be displayed.
How are typing indicators sent and received?
Typing indicators are exchanged via the same Signal Protocol messaging channel that protects conversations and calls. They are also sent using sealed sender whenever possible.