A block explorer is a tool that lets you look up blockchain transaction history, like a search engine for the chain. You can search by wallet address, transaction hash, block number, or smart contract address.
For example, you can check on an explorer whether a transaction is pending, confirmed, or failed, which address it was sent to, and how much the fee was. That said, since data on a public chain can be public, be mindful of privacy.
text
Transaction Hash -> Search in Block Explorer
Status: Success / Pending / Failed
From: Wallet A
To: Wallet B or Smart Contract
Fee: Network gas feeYou should see
A block explorer is basically the blockchain's public receipt viewer.