The CYBERscope is a web page app that can work together with your micro:bit to take various multimeter measurements. It can also take other types of measurements, like oscilloscope and logic analyzers, but those will be introduced later. This web app works with Chrome browsers that are Version 89 or newer. The cyberscope.parallax.com page will tell you if your Chrome browser version is compatible.
Up-to-date Chrome Browser
Older version Chrome browser -needs updating!
Instructions from here downward are only for browsers that displayed the message with the red banner. If you didn't see the red banner, just continue to the next page.
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Links
[1] https://cyberscope.parallax.com
[2] https://learn.parallax.com/tutorials/language/python/breadboard-setup-and-testing-microbit/set-power-circuits/cyberscope