Yes, Blockchain and Web3 are different concepts, but they are closely related and often used together to create decentralized applications (DApps) and services. In this article I will break it down to show and clear some peoples mind on these two concept the blockchain and Web3:

Blockchain:

Technologically Blockchain is a distributed ledger that enables the secure and transparent recording of transactions across a network of computers. It is the underlying technology for Cryptocurrencies like Bitcoin and Ethereum.
Blockchains are typically decentralized, meaning there is no central authority or single point of control. Instead, data is stored and verified by a network of nodes (computers) that reach consensus through consensus algorithms like Proof of Work (PoW) or Proof of Stake (PoS).
Interm of Use Cases blockchains are primarily used for recording and verifying transactions. They provide a tamper-resistant and transparent ledger for various applications beyond Cryptocurrencies, including supply chain management, voting systems, identity verification, and more.
Blockchains are known for their robust security due to cryptographic techniques, immutability (once data is added, it's difficult to change), and decentralization.

Web3:

Concept: Web3, short for "Web 3.0" or "Web of the Future," is a vision for the next generation of the internet. It aims to create a more decentralized, user-centric, and secure internet by integrating blockchain and other emerging technologies.
Web3 is about building decentralized applications and services that operate on top of blockchains or other decentralized protocols. It seeks to reduce reliance on centralized intermediaries like social media platforms, banks, and cloud services.
Interoperability; Web3 envisions a future where different blockchain networks and decentralized protocols can seamlessly interact with one another. This would enable users and applications to move data and assets across various blockchains.
In a Web3 environment, users have more control over their data and digital identities. They can own their data, control who accesses it, and grant permissions using cryptographic keys.
Smart contracts, which are self-executing contracts with the terms of the agreement directly written into code, are a key component of Web3 applications. They automate processes and enable trustless interactions.

So lastly, Blockchain is the foundational technology that provides the basis for trust and security in Web3 applications. While Web3 represents a broader vision for a decentralized internet, where blockchain technology plays a pivotal role in enabling new forms of applications and services that prioritize user control, privacy, and interoperability.