Waving Hand: Medium Skin Tone on Telegram

What it signals here

sticker mapping

Corresponds to animated wave sticker packs commonly used in greeting sticker sets.

channel use

Channel admins use it to greet new subscribers or open a broadcast message.

group meaning

Used in group chats to greet the room or announce one's presence after joining a new group.

bot context

Telegram bots often use this emoji in welcome messages when a user starts a new interaction.

See it elsewhere