What is Layer 2?

A network that executes transactions cheaply and settles them on a layer 1.

Rollups bundle thousands of transactions and post a compressed proof of them to Ethereum, cutting cost per transaction by orders of magnitude.

Security comes from the base chain, but sequencing and bridges add trust assumptions that a base chain does not have.

Layer 1Basics
A base blockchain that settles its own transactions, such as Bitcoin, Ethereum or Solana.
BridgeSecurity
A service that moves assets between chains, and one of the most exploited pieces of infrastructure.
Gas feeOn-chain
The fee paid to have a transaction included in a block; priced by network demand.

See it on a coin page