Bridges are nothing but an invisible pathway that allows independent blockchains to communicate with each other. These bridges are the multi-taskers of the Crypto world. It works differently on the Polkadot network. They help in attaching parachains and the main Relay Chain to other external blockchain networks – Your Bitcoin and Ethereum for instance. They do so to help the collator nodes that are attached to the parachains, to assemble and keep a check of the transactions. Wait, before the question even pops in your head, let us tell you – The reason why collator nodes attach themselves is that they only communicate via a bridge and connect with external blockchains
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