Coinbase primarily uses the Bitcoin network for transactions, as it was originally designed as a Bitcoin wallet and trading platform. Additionally, Coinbase has integrated support for other networks such as the
Ethereum network, allowing users to buy, sell, and store a variety of cryptocurrencies. Recently, Coinbase has also developed its own Base Network, a Layer 2 scaling solution built on the Optimistic Ethereum stack, which enhances the scalability of the Ethereum blockchain and reduces transaction costs.