There is much confusion in this question. What you call "wireless driver" is apparently the built-in WiFi transceiver in your computer. If so, this has nothing to do with a driver. Whatever device you use to access WiFi will need a software component called a "driver".
The thing suggested to you appears to be an external WiFi transceiver. It will, of course, also have its own driver, but that is irrelevant. The main point of the device is that it can be physically bigger and doesn't need to be crammed into the existing machine (laptop?) somewhere. The external antenna can be angled for best reception, and you can arrange for there to be mostly free space around it.
The top thingy in your picture is the actual WiFi transceiver. It obviously plugs into a USB socket. The gold connector on the other end is meant for the antenna to screw onto. The larger L-shaped thingy is the antenna. Note that it can swivel in one dimension so that you can arrange for the antenna to be optimally oriented. Usually straight up with some free space around it is the best orientation without knowing anything specific about your WiFi installation.
You can also use a short USB extension cable between the device and a USB socket on your computer. That might allow the antenna to be in a more advantageous position than right by the computer.
Yes, the external device might give you better WiFi capability due to allowing better placement of the antenna. If your WiFi is poor due to overload, then a better antenna isn't going to help.