The bitcoin community has been discussing the concept of the Lightning Network for a year now. It is often cited in scalability debates as a solution to bitcoin's limited transaction throughput capabilities.

However, it's a complicated concept and several parts of the implementation are still theoretical or in development.

This article will attempt to provide more insight into how the Lightning Network will operate and the challenges it will face.

https://www.coindesk.com/lightning-technical-challenges-bitcoin-scalability/