Blockchain technology- What is the essence of the Blockchain Technology? what is a distributed ledger?

Blockchain technology-Background.
What is the essence of the Blockchain Technology? what is a distributed ledger?
Blockchain key Features and Applications
Blockchain platforms that support Smart Contracts
what makes the Blockchain innovation unique in the context of the contracting process? Smart Contracts and DLT
Give the Characteristics of Smart contracts that entrench the stability of the business transactions.
Smart Contracts’ platforms-Ethereum
The categories of Smart Contracts-DIFFERENT MODELS OF SMART LEGAL CONTRACTS
Compare between smart contract and the traditional contract.
Difference between smart contract code and legal smart contract. How a smart contract becomes legal smart contract
How do Smart Contracts compare to the traditional contract?- Legal Analysis
How would smart contracts would take over the traditional contracts
Validity and legality of Smart Contracts-
enforce ability of smart contract
Implementation of Smart Contracts
Discuss the legality of Smart Contracts and its benefits for the business and the importance of adapting it as a new form for the traditional contract.