Layer 1 is the actual base blockchain, the core network that everything else depends on. It’s the layer that decides what counts as a valid transaction, keeps the shared history, and makes sure thousands of computers agree on the same truth without any central boss.

Technically, its job is to solve the hard problem of getting a bunch of untrusted machines to reach consensus. It does this through cryptography and economic incentives (like mining or staking). Once a transaction is locked in, changing it becomes extremely expensive or nearly impossible. That’s what gives the whole system its security and finality. Higher layers and apps simply inherit that security; they don’t create it themselves. This is also why the famous “blockchain trilemma” lives mostly at Layer 1: you can push hard on security and decentralization, but pure speed and low cost usually suffer.
The big advantages are real. A strong Layer 1 is very hard to attack because rewriting history costs a fortune in computing power or staked coins. It stays decentralized, so no single company or government can easily control or censor it. The record is basically permanent, and people can interact without trusting each other or a middleman. Networks that have been running for years have already survived real economic pressure, which builds confidence.
The downsides are just as real. Most Layer 1s can only handle a limited number of transactions per second, so when demand spikes, the fees jump and confirmation times stretch. Running a full node takes serious storage and bandwidth. Upgrading the protocol is slow and often needs a hard fork. And because the base layer prioritizes security over speed, everyday use can feel expensive and sluggish, which is exactly why Layer 2 solutions were invented.
In the end, Layer 1 is what makes crypto trustworthy in the first place. Everything else is built on top of the guarantees it provides.
‍#LearningWithGM #SummerCreationCamp
This is not financial advise, always do your own research.