Speed tester is used to check the speed of your internet connection. It will give you an idea of how fast your internet connection is by checking the internet speed in your home or office. You can also use it to test how well your router works. The speed tester can test both wired and wireless connections. It may also come with a feature that allows you to do a speed test on a certain website. If you want to check the speed of your mobile device, you can use this tool.