What is blockchain explorer?

What Is Blockchain Explorer?

A block explorer is a website that lets you search and view data on a blockchain. You can enter a wallet address to see its balance and transaction history, or a transaction ID (hash) to see details (amount, status, block). Examples: Etherscan (Ethereum), Blockchain.com (Bitcoin). Explorers are read-only; they do not hold your keys. Use them to verify that a transfer was sent and confirmed, or to check a contract or address before interacting.