My friends don't have much experience in crypto, and I often hear the word blockchain, so I want to ask all of my friends? namely, what is blockchain, its function and how does it work? please help to explain?
Blockchain is a special format of storing data. A special type of database, very good for decentralized and trustless use because, especially if built in the way Bitcoin's blockchain is done, they will not allow modifying data from the past.
The rest of info, especially details on what does Bitcoin's blockchain store and how, will be there in the links already provided by others.