---
# System prepended metadata

title: ​​​​                 BLOCKCHAI

---

                          BLOCKCHAIN
    is a decentralized,distributed digital leger that record transaction across many computers. its is also a database of transcation
    
                          HOW BLOCKCHAIN WORKS
-someone request a transaction
-Transaction is complete and permanent
-Network validates the transaction usingalgorithms
-Block is added to the existing blockchain
Transaction is broadcast to a network of computers(nodes).

"nodes"-multiple server
"block"-bunch of transaction

                           KEY BLOCKCHAIN CONCEPTS
-Decentralization
-transparency
-immutability
-consensus
-crytograhy


             WEB 3
    is the next evolution of the internet that focuses on decentralization, blockchain technology, and user owners
    
-Aim to reduce reliance of big tech companies
-built on blockchain technology
                     
                        Web1-Web2-Web3
web-1 
-read only static websites
-one way infomation flow

web-2
-interactive, social platfrom
-user-generated content

web-3
-user-owned internet
-Decentralized application