Three sentences explaining centralized and decentralized exchanges:
On a CEX, on-chain transfers usually occur only when depositing or withdrawing; trades within the platform simply update the balance in its ledger.
CEXs typically offer fiat deposits and withdrawals, customer support, and account recovery, but you have to trust the platform’s risk controls and asset management.
Before swapping tokens on a DEX, verify the token contract address and pay attention to slippage settings and approvals—don’t rely on the token name alone.
$BNB 748.98 (+0.88%)

Just my personal opinion; don’t treat it as trading advice.