A stock screen (frequently referred to as a stock screener or equity scanner) is a powerful financial software tool used by investors and traders to filter thousands of publicly traded stocks based on specific quantitative and qualitative metrics. Users can set custom parameters such as market capitalization, dividend yield, price-to-earnings ratios, trading volume, and moving averages to quickly isolate specific companies that match their exact investment strategies. This eliminates the need to manually browse individual company profiles, saving valuable time during market research.