Hello;
I have a question:

Does NukeSEO improve my site ranking in Search engines (Google)???

I mean that:
If I use it;
Does my site will be in the top of search engines (Google)??
or at least improve it!

Thanks for you...

nukeSEO cannot gaurantee to get you to number 1 in Google however, because it makes it easier to modify your meta data and keywords your optimization will improve.
In other words, your chances of getting a better result in search engine listing will be better using it than not using it.

Page Ranking is dependant on a number of things, its a journey not a quick fix.