Blockchain is like a digital and unchangeable record-keeping system. Imagine it as a long chain of information blocks, where each block contains data, like transactions or pieces of information.
Now, the special thing about blockchain is that once a block is added to the chain, it cannot be altered or deleted. It's like sealing the block with a digital lock, and all the blocks are connected in a specific order, making it hard to change anything without others noticing.
This secure and transparent system has many uses, with the most well-known one being the foundation for cryptocurrencies like Bitcoin. Whenever you make a Bitcoin transaction, it gets recorded in a new block, added to the chain, and connected to the previous blocks.
Blockchain is also used in various other applications, such as supply chain management, voting systems, and even verifying the authenticity of digital art or documents. Its ability to provide a trustworthy and tamper-resistant record has made it a revolutionary technology with the potential to transform many industries.