๐ซฑ๐ปโ๐ซฒ๐ฟ represents handshake: light skin tone, dark skin tone, typically shown as two hands meeting in a firm handshake. One hand is light-skinned and the other is dark-skinned, with the hands joined in a balanced, mutual grip.
This hand gesture mainly means agreement, partnership, or mutual respect. It is commonly used to signify that a deal has been reached, a contract is signed, or a new professional relationship has begun between diverse parties.
You can use this in a chat to say "deal!" after a negotiation or to welcome a new member to a team. It also works well in captions for photos of friends or colleagues to show a solid bond or to simply say "it's a pleasure to meet you."