This product is just as described -- a handy USB 2.0 connector set with headers for signal interception and interconnection. You'll know if you need one, but if you do, these well-made little boards are a very nice bench addition.
The easy way to add an eeprom to your HAT project. If a product is missing that eeprom, or for your own hardware, this little add-on add the feature for you. You may need to dig into documentation on the device tree, how to program eeprom, but you will need that anyway.
This is a great dongle to raspberry pi zero, great price and works smoothly, solderless, just plug and play! You can use just to power you raspberry pi or can use USB to device mode (what you think about turn your raspberry pi in a network card? usb to serial adatpter? or flash drive?) Thanks mister "8086 Consultancy" about this creation, amazing!