A Web3 payment moves value directly between two wallets on a public blockchain. There is no bank in the middle approving or reversing the transfer. The network itself records the transaction and both sides can verify it.

That changes three things: settlement is usually minutes instead of days, the sender needs no permission to send, and a completed transfer cannot be clawed back.

Blockchain is a shared public ledger that many computers keep copies of, so no single company controls the record.

A wallet is not a place where money sits. It is a set of keys that proves you control an address on the network. Lose the keys and you lose access, because there is no support line that can restore them.

Self custody means you hold the keys. Custodial means a company holds them for you. Both are valid, and they carry opposite risks: your own mistakes versus their solvency and policies.

Seed phrase is the list of words that regenerates your wallet. Anyone who reads it controls your funds.

Most sellers do not want to be paid in something that can move fifteen percent overnight. Stablecoins are tokens designed to track a reference value, usually one dollar, so an invoice for one hundred is still worth roughly one hundred when it clears.

They are the reason crypto checkout became practical for ordinary businesses rather than a novelty.

Reserve backing is what a stablecoin issuer holds to support the peg. Issuers differ widely in what they hold and how often they prove it.

The same stablecoin can exist on several networks, and the network you choose sets your cost and your wait. A transfer that costs a few dollars on one chain can cost a fraction of a cent on another.

Before sending, confirm that the receiving address is on the same network you are sending from. Matching the token but not the network is the most common way people lose funds.

Gas is the fee paid to the network for processing your transaction. It rises when the network is busy.

The pattern is always the same. The receiver shares an address or a QR code. The sender selects the token and the network, pastes the address, and confirms. The network returns a transaction hash, which is the receipt both sides can look up.

Send a small test amount first on any new address. The cost of a test is trivial. The cost of a mistake is total.

Transaction hash is the unique ID of a transfer. Paste it into a block explorer to see its status.

Nearly every loss comes from a handful of repeated patterns: a fake support account offering to help, a site that asks you to type your seed phrase, an approval that hands a contract open access to your balance, and an address altered by clipboard malware.

Three habits cover most of it. Never enter a seed phrase into any website. Verify the first and last characters of an address after pasting. Review and revoke old token approvals periodically.

Token approval is permission you grant a contract to spend your tokens. It stays active until you revoke it.