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The conch is significant as it is the medium through which Ralph becomes leader. He blows the conch originally which draws all the other boys to the beach. They then proceed to vote him as leader. The conch gives people a voice, as when you are holding it you have the power due to the focus of all the other boys being on you. The conch symbolizes what little bit of civilization and rules the boys still have. When it is crushed on the rocks later, when piggy dies, this shows the utter shattering of all chance of civilization. This proves the boys have turned into complete savages.
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It represents authority.
The conch shell.
Who said we don't need the conch anymore in the Lord of the flies
In the lord of the flies the symbol of authority is the pink cream colored conch shell