I always like threads where they ask about Wi-Fi And then start talking about Wireless,, They are not the same thing at all.
However it is true that boosters do amplify the signal, if any, and thus give you more range, No matter which band you are using.
(Wi-Fi or Wireless). Also, with Wireless "height is might" (not so much on Wi-Fi but even there it can make a difference)
I have proven the Height is Might with personal testing....
IN both cases more height means less "Stuff" (Other RV's for example) between you and the router or tower, this means a stronger signal. With Wireless, where you can not always physically see the tower It can be a BIG difference.. I'm 3 miles from the nearest wireless tower and alas, can not see it well enough to use it (plus it is a low speed tower) Wi-Fi I'm only about 1oo yards from the park office, STRONG signal.