Understanding Bitcoin's Lightning Network in Plain English
Bitcoin was designed to be electronic cash. In 2010, a programmer called Laszlo Hanyecz paid 10,000 Bitcoin for two pizzas, an event now celebrated annually as Bitcoin Pizza Day. Those 10,000 Bitcoin would eventually be worth hundreds of millions of dollars, which is one reason that story is famous. But there is a less discussed reason it matters: Bitcoin at its base layer processes somewhere between five and seven transactions per second, compared to Visa's capacity of around 24,000. If Bitcoin is going to be used for anything resembling everyday payments, it needs a different approach. The Lightning Network is that approach. This blog explains what it is, how it actually works at a level anyone can understand, what it is being used for today, and where it still falls short.
By CryptoAcademy Team | Published: 2026-04-15 | 18 min read time read | Category: Educational
The Bitcoin Scalability Problem: What Lightning Solves
Every ten minutes, a new block is added to the Bitcoin blockchain. Each block can contain a limited amount of transaction data. This means that only a finite number of transactions can be confirmed in any given ten-minute window.
When demand is low and only a few thousand people are transacting, this works fine. Transactions process in the next block or two, fees are minimal, and everything is smooth.
When demand is high, as it was during the 2021 bull market and during major NFT and ordinals activity in subsequent years, the available block space fills up. Transactions queue. Users who want their transactions confirmed faster have to pay higher fees to outbid other users. During peak congestion, Bitcoin on-chain transaction fees have reached $10 to $50 per transaction, and wait times have stretched from ten minutes to hours.
This creates an obvious problem for Bitcoin's stated purpose as digital cash. You cannot run a payments system where buying a coffee might cost $12 in fees and take half an hour to confirm. The economics and the user experience simply do not work.
There are two broad approaches to solving this. One is to change the base layer of Bitcoin, for example by increasing the block size to fit more transactions. This is what Bitcoin Cash attempted (and a big reason it split from Bitcoin). The other approach is to handle most transactions off the main blockchain entirely, only using the main blockchain for final settlement. This is the Lightning Network's approach, and it is the approach Bitcoin's core developers have favoured precisely because it does not require compromising the security and decentralisation of the base layer.
Bitcoin can only process around seven transactions per second compared to Visa, which can process around 24,000 in the same amount of time. The Lightning Network protocol solves this problem by theoretically handling millions of transactions per second off-chain.
---