Promoting Apps With Smart App Banners
You can encourage your mobile website customers to use the app whether they have it installed or not.
If the user has the app installed, you can additionally open the app with a deep link to the current page they were on.
Given the example in Apple's documentation:
<meta name="apple-itunes-app" content="app-id=myAppStoreID, affiliate-data=myAffiliateData, app-argument=myURL">
If we wanted to link to a page, it would look like:
<meta name="apple-itunes-app" content="app-id=myAppStoreID, affiliate-data=myAffiliateData, app-argument=com.poq.myAppName://products/category/categoryID">