Since the introduction of USB-C, many devices like phones, tablets, and computer accessories have switched over to that cable format. It offers higher bandwidth, greater charging capabilities, and compatibility with modern video standards.
But the humble Micro USB, which not all that long ago was the dominant port for powering many devices, is still sticking around. Many older phones and tablets that use Micro USB still work fine, and even some newer devices designed to be manufactured cheaply use Micro USB still.
It does the job that’s required of it, so if you have any devices that use Micro USB, you’re going to need cables to use with them.