The Spectrum Speed Test is a web speed test gave, and suggested, by Charter, a significant US ISP.
Testing your web association with the Charter Speed Test is free and, while accessible to everybody, is presumably best saved for Charter clients (more on this at the lower part of the page).
Like most of the bandwidth testing tools for e.g. fast.com or speedtest.net Spectrum speed test also does the job in single click.
Follow the instructions to check your bandwidth speed.
Go to https://www.spectrum.com/internet/speed-test on your preferred browser.
Click on Go button on your screen.
Wait while Spectrum completes the test.
Once done you will have your internet speed appeared on your screen.
Note: It is recommended that you connect your Computer or Laptop directly to your main router to get the accurate results as much as possible.
When the results appear on the screen, you will see summary of the test on the screen which will show the download and upload speed in Mbps (megabits per second) along with the information about your ISP (internet service provider). You will also have the option of retest incase you are not happy with the initial results or if you want to retest after making any changes.