Bridge (cross-chain bridge)
A service that moves value from one blockchain to another, for example from Ethereum to Tron.
In plain words
Coins cannot travel between blockchains directly. A bridge locks them on one chain and releases matching coins on another.
Why it matters if you've been scammed
Scammers use bridges to move money to a different chain. Most bridge transfers leave a link that a trace can follow to the other side.