Day trading involves buying and selling financial instruments, such as stocks, options, or currencies, within the same trading day, with the aim of profiting from short-term price movements. Traders often use technical analysis, chart patterns, and market news to make quick decisions, and they typically seek to capitalize on volatility and liquidity. It requires a significant time commitment, keen analytical skills, and a strong understanding of risk management, as day trading can lead to both substantial gains and significant losses.