A Bitcoin transaction hash is like a transaction reference from banks. A transaction hash always refers to one specific transaction.
Here is an example of what a hash looks like: 3387418aaddb4927209c5032f515aa442a6587d6e54677f08a03b8fa7789e688.
A hash can be used to check several details of its corresponding transaction such as:
- The transaction's status
- The amount transferred
- The mining fees
- The associated Bitcoin addresses
- The time when the transaction was performed
More information on how to search for a hash in a Blockchain Explorer can be found here.