What device do you have? It just seems like a switch to turn Wi-Fi on or off. If you don't need Wi-Fi on all the time, you might save a little battery by turning it off. Also review this guide: http://forums.androidcentral.com/am...how-tos/298919-guide-battery-saving-tips.html
Edit--sorry, when I wrote the above, I actually didn't see the lower part of that image on the AC app. It'd still help to know what device it is.
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