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Blockchain technology is a digital system used to record and store information securely across a network of computers. Instead of keeping data in one central place, blockchain distributes it among many participants, making it transparent and difficult to change or hack. When a transaction happens, it is verified by network participants and added to a block. Once the block is confirmed, it is linked to the previous blocks, forming a chain of records. This process ensures trust and security without a central authority. Many new projects, including the Best Crypto Presale 2026, are using blockchain to build decentralized and secure platforms.