A stock screener is a tool that helps investors filter and analyze stocks based on specific criteria. By using a stock screener, you can quickly find companies that meet your investment goals, such as market capitalization, dividend yield, or price-to-earnings ratio. This makes it easier to identify potential investment opportunities without having to sift through thousands of stocks manually. Many online platforms offer stock screeners, allowing users to customize their searches. For example, you might want to find technology companies with a strong growth rate or dividend stocks that provide regular income. This way, stock screeners simplify the investment process and help you make informed decisions.