Whenever we create smartphone game and upload it on app store/play store it is often required marketing in order to increased download. But what if we have done marketing still there are no downloads then what is next procedure for the mobile game downloads? I have heard about App Store Optimization but have no idea from where I can learn it professionally, sure there are tutorials present on App Store Optimization on YouTube but they are just good basic clarity of concept, they are no way professionally substitute. YouTube is good for starting but are not enough for professional ASO. So can someone guide me from where I can learn App Store optimization so that I can increase downloads?