Block and chain, because the word suggests, a sequence made of blocks! So we understand what are these blocks. Blocks can be a kind of database! People who focus on computers know databases perfectly! And for people that do not know, as we say in simple language, then this database https://eduardoogyp04815.blogdeazar.com/30700665/what-is-blockсhain-technology-and-how-does-it-work