Share your app directly from Safari mobile.
Website Smart App Banners are a method of promoting your app on a web page viewed in mobile Safari. When the user lands on your official website, for example, they would see an unobtrusive banner ad at the top of the page. The banner provides basic info about the app and allows the user to go to the app store in just 1 click to download.
The framework of a Website Smart App Banner.
Luckily, adding Smart App Banners is easy. You simply need to insert the following meta tag to the head of your website.
Text
<meta name="apple-itunes-app" content="app-id=myAppStoreID"/>
Then, swap out app-id for your app's unique identifier. This information can be found on the iTunes Link Maker. Search for your app, click the iPhone App Link on the right hand column and your app-id will be in the direct link URL between id and ?mt.
For Android apps, there is currently no solution that Google endorses, but there are various 3rd-party solutions which require a web developer to integrate.