Adding a section to your description is useful and will allow your application to show more search phrases. The trick is there is more of a Google algorithm that generates hits for your application. Here are some warnings I noticed after a few simple studies:
The name of the application gets a higher priority than the description. Thus, the tag in the description called “free wallpapers” will not generate a higher return match than the application called “free wallpapers” unless other factors contribute and increase it.
The number of application downloads generates a higher percentage.
I am sure there are others, but these were the main two participants that I could deduce from my research.
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