A bridge in crypto connects two different blockchains, allowing users to transfer tokens or data between them.

Why it's needed:

Blockchains like Ethereum, BNB Chain, and Solana operate independently. A bridge lets you move assets across them.

1. You lock tokens on one chain (e.g., ETH on Ethereum).

2. The bridge creates equivalent tokens on another chain (e.g., ETH on BNB Chain).

3. When you return the bridged token, your original is unlocked.

- Centralized: Controlled by a company or team.

- Decentralized: Run by smart contracts and validators (e.g., Wormhole, Multichain).

- Smart contract bugs

- Hacks (bridges are common targets)

- Delays or high fees

Moving tokens, accessing DeFi on another chain, reducing gas fees, or gaining cross-chain utility.

Always use trusted bridges and double-check URLs.