This adapter is very useful for connecting any USB device to your USB-C computer or phone. Also good for connecting USB-A devices to USB-C power blocks for charging. If you still have many older USB-A cables and are using a USB-C only laptop like any of the newer Apple models, buy a few of these instead of new cables for every device.
This adapter is mainly used to connect your new USB-C device, such as a phone to an older computer or USB-A power block. Most USB-C devices come with a cable which does this conversion, but if you already have a USB-C to USB-C cable then carrying an adapter like this is simpler.
This adapter is popular for charging older Micro USB devices, such as headphones or battery packs by using a USB-C cable. So, if you have USB-C cables and chargers, it is easier to carry these converters than an extra USB-C to Micro cable.
If you have a Micro USB cable that you need to plug into a USB-C computer or phone, this adapter is for you.
If you have a Mini USB cable that you need to plug into a USB-C computer or phone, this adapter is for you.
This adapter is popular for charging older Mini USB devices, such as headphones or battery packs by using a USB-C cable. So, if you have USB-C cables and chargers, it is easier to carry these converters than an extra USB-C to Mini cable.