Add a query in the search field
According to App Store, 65% of apps are installed through the store search.
Look through the search results
Usually the first 5-10 apps.
Choose an app with the graphics
(icon, screenshots) They like and with an acceptable rating.
Two-thirds of users look at app ratings before installing an app. An app with a 3-star rating may lose about a half of potential installs while an app with 1-star or 2-star rating may lose them all.
Take a more detailed look at screenshots, videos (if any), app description, and user reviews.
Make up their mind to install the app.