Wlan with wireless stick improve?

So it is possible that I zb a Wlan stick in my laptop (wi-fi) reingecke and so improve my Wi-Fi?

So a Wi-Fi stick in a Wi-Fi to use functional device to improve the Wi-Fi is it?

No, the WLAN modules in notebooks are usually better than sticks.

If it is a high-quality stick with one or even two large antennas then that is well conceivable.
And if the stick supports about n-WLAN and your notebook only b or so, then anyway.

That can't be answered flat rate, one would have to know the actual state, i. Which router and which W-Lan chip. With Wlan USB sticks you have to pay attention to which chip is installed, often the cheap Realtek chips are installed. I always exchange directly with Tablets / Laptops the W-Lan chip, if only because it brings more and is cheaper