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 [[intro_what_is_the_lightning_network]]
 == Introduction

-Welcome to Mastering the Lightning Network or "LN" as we'll call it throughout the book! 
+Welcome to Mastering the Lightning Network or "LN" as we'll call it throughout the book!
 The LN is a protocol for using Bitcoin in a smart and non obvious way.
 Thus it is a second layer technology on top of Bitcoin.
 It is changing the way people exchange value online and it's one of the most exciting advancements to happen to the Bitcoin network over the past few years. Right now, LN is in its infancy. In concept it's about 5 years old, in implementation about 3 years old. We're only beginning to see the opportunities LN provides including improved privacy, speed, and scale. With core knowledge of LN, you can help shape the future of the network while building opportunities for yourself as well. Some basic knowledge about Bitcoin is assumed but can be readily acquired by reading the first two chapters of _Mastering Bitcoin_ which are available for free online.