blockchain is just a chain of blocks. miners put the transaction together and make a "block" then these blocks are added together to make the blockchain.
read these: https://bitcoin.org/en/ watch the video
https://bitcoin.org/en/how-it-works

there are more at coindesk:
https://www.coindesk.com/information/how-does-blockchain-technology-work/

no need to be sorry, just do a little search first then ask a more specific question here. your question is too vague and to broad.