Layer part 1:

In the context of blockchain technology, a layer refers to a distinct level or component within the blockchain architecture that serves a specific function or purpose. Layers are often used to organize and streamline the operation of a blockchain network.
https://warpcast.com/bernardfrc/0x2163b36b

Layer Part 2:
For example, the Bitcoin blockchain operates on multiple layers, including the base layer for recording transactions and higher layers such as the Lightning Network for facilitating faster and cheaper transactions.

Layer Part 2:
For example, the Bitcoin blockchain operates on multiple layers, including the base layer for recording transactions and higher layers such as the Lightning Network for facilitating faster and cheaper transactions.
https://warpcast.com/bernardfrc/0xd43d349b