Blockchain Basics
Blocks, validators, gas fees and decentralization — explained simply.
1A public logbook
A blockchain is a public database recording every transaction. Transactions fill a block; when the block is full, thousands of validators collectively verify it. Once approved, the block is sealed, chained to the previous one, and a new block opens. This repeats forever — creating a chain of blocks nobody can quietly rewrite.
2Key vocabulary
Five terms you will see everywhere. Don't overthink them — just recognize them when they come up.
- Blockchain — public database of all transactions.
- Wallet — your crypto account.
- Token / coin — a digital asset.
- Gas fee — the cost of making a transaction.
- Liquidity — the money available to trade against.
3Decentralization = safety
A chain is safe as long as validation stays decentralized — thousands of independent validators instead of one entity. Bitcoin proved value transfer; Ethereum added smart contracts (self-executing agreements written on-chain); then came Solana, the fast, cheap chain where most meme coins live today. Every chain has a native token that acts like fuel — on Solana that's $SOL.
Learning material summarized from the free "A Complete (Meme)Coin Guide" by @spyzer — shared with full credit.