We can define Blockchain as a distributed database that provides briefly an encrypted transaction set-up. Blockchain technology, constructed from a chain model, which can be understood from its name, is traceable but not breakable, allowing to operate without being connected to a center. Thus, transactions can be carried out directly between the buyer and the seller and in a secure manner. Just like sharing music between people over Napster once in a while.
And many thanks for sharing @amiramnoam