For anyone browsing Malachain, here is a clear starting point on the subject.
A blockchain is a shared record that many computers keep identical copies of. New entries are grouped into blocks, and each block contains a mathematical fingerprint of the one before it, so changing an old entry would break every block that follows. Because the copies are compared constantly, no single participant can quietly rewrite the history on their own.
This design is useful where several parties need to agree on a record without trusting one central keeper, but it comes with trade-offs. Public blockchains can be slow, some consume a lot of electricity, and mistakes are hard to reverse because there is no central office to call. Understanding these limits helps when judging whether a project really needs one.
It also helps to talk the subject through with friends or colleagues who have tried something similar. Their experience points out the details that guides leave out: how long things really take, which costs were unexpected, and which shortcuts turned out to be a mistake.
There is more to learn on this subject, and the linked website goes into greater depth. Treat this article as an introduction rather than the final word, and check any important decision against up-to-date, reliable sources before relying on it.
If you try any of these ideas, start small and adjust them to your own situation. What works for one person will not suit everyone, and it is fine to keep only the parts that help. Writing down what you changed, and what happened, makes it much easier to see after a few weeks whether the effort was worthwhile.