Blockchain technology mean?

[cavinn09]

It is too complex to understand. How works blockchain technology?

[arbiter5]

Beginner’s Guide to Blockchain — Explaining it to a 6 Year Old https://hackernoon.com/beginners-guide-to-blockchain-explaining-it-to-a-6-year-old-86afa54a5fa8

[bitmover]

It is too complex to understand. How works blockchain technology?

In simple terms, Blockchain is just a decentralized database.
A slow and heavy database. It works for bitcoin because it must be decentralized and you don't need to trust anyone to use it.

Many people want to put everything in blockchain, but that's really not necessary, nor useful.