What is Slither io? Why Does the Game Attract Millions of Players?

Slither io is a free online action game that runs on web platforms as well as iOS and Android operating systems. In the game, you play as a small snake entering a vast arena. Your sole objective is to eat glowing orbs to grow and become the longest snake on the map.
The unique selling point of Slither io lies in its equality:
Size doesn’t matter: Whether you’re a tiny newborn snake or a giant occupying half the screen, simply touching your opponent’s body will instantly eliminate you.
Competitive gameplay: You can defeat giant snakes with your skill and cunning.