The intention to publish in this community and in any other platform is to publish original content, part of this publication has been found in other websites. This is synonymous with plagiarism and is not allowed in our community.
https://www.euromoney.com/learning/Blockchain-Explained/What-is-blockchain
The fact of placing an information and not quoting the source (the author) from where it was extracted makes it a plagiarism, if you don't know how to do it I leave you this link so you don't make the same mistake again:
@josevas217/some-important-points-to-avoid-falling-into-plagiarism
RE: what is block chain technology?