ASO in seo stands for App Store Optimization. It is also known by a few names, including App Store Marketing and Mobile App SEO. App Store Optimization (ASO) is the process of improving app visibility within the app stores and increasing app conversion rates. The major app stores are App Store for iOS and Google Play for Android. In addition to ranking high in the app store search results, ASO also focuses on click-through rate (CTR). This means you have to convince people to actually click into your app store listing once they find it. You can do so by optimizing your App Name, App Title, App Icon, App Screenshots and App Rating.