TRC-20
An equivalent of the ERC-20 standard, but on the TRON network. It is widely used for USDT transfers — fees on TRON are typically much lower than on Ethereum.
See also
Proof-of-Work (PoW)
A consensus mechanism in which miners prove they performed computational work in order to add a new block. Used by Bitcoin, among others; it requires significant energy.
Proof-of-Stake (PoS)
A consensus mechanism in which the right to validate blocks goes to participants who have locked up (staked) their cryptocurrency as collateral. It is more energy-efficient than Proof-of-Work.
ERC-20
A technical token standard on the Ethereum network that defines common rules for creating fungible tokens. The vast majority of tokens on Ethereum are issued under this standard.
BEP-20
A token standard on the BNB Smart Chain (BSC), structurally compatible with ERC-20 but with lower transaction fees.
Cold wallet
A wallet whose private keys are stored offline (for example, on a dedicated device). It is considered the safest way to hold large amounts long-term.
Hot wallet
A wallet that is always connected to the internet (an app or browser extension). Convenient for frequent transactions, but more vulnerable to hacking than a cold wallet.