Chrome store optimization (ASO for chrome extension)

App Store Optimization for chrome extension on chrome store

we want to gain more visibility in chrome store and so need an expert who knows about keywords and overall presentation to get traffic. : https://chrome.google.com/webstore/detail/csociety/nikpkakmbeifhhoechfnjnoaiiegnhak

We expect:
-ranking to improve
-receive an increase of downloads

Please only apply if you have provable results - we are looking for someone with experience of good results