Understanding the spread is crucial for assessing trading efficiency and the true cost of market participation. A tight spread often indicates a liquid market with minimal transaction costs, while a wide spread can signal illiquidity or higher trading costs. By closely monitoring the spread, traders can optimize their entry and exit points, manage trading expenses, and improve overall profitability. Check the spread before placing trades, particularly in volatile markets. Consider adjusting your strategy to account for higher spreads during periods of low liquidity.