Speedtest by Ookla for Windows is a free application that allows Windows users to test their internet connection speed. It measures both download and upload speeds, as well as ping (latency), providing a comprehensive overview of internet performance. The results show how fast your internet is at that particular moment, helping you identify potential issues with your internet service provider (ISP) or your home network. The app is a convenient and easy-to-use way to quickly run a speed test without needing a web browser.