Blockchain is a database that contains a history of whatever information it is designed to store Blockchain consists of a series of information blocks built on top of one another in an immutable chain This book guides developing Smart Contracts with Solidity on Polygon Ethereum is a lovely blockchain to work with but the heavy traffic and many people building on it have made the network a bit congested The 2nd layer solution to solving this problem by extending the scalability of Ethereum is with Polygon Polygon is an Ethereum companion network with Ethereum security and lower gas fees Blockchain is a database that contains a history of whatever information it is designed to store. Blockchain consists of a series of information "blocks" built on top of one another in an immutable chain. This book guides developing Smart Contracts with Solidity, on Polygon. Ethereum is a lovely blockchain to work ...with, but the heavy traffic and many people building on it have made the network a bit congested. The 2nd layer solution to solving this problem by extending the scalability of Ethereum is with Polygon. Polygon is an Ethereum companion network with Ethereum security and lower gas fees.