A(n) ____ gives your app users the ability to open your app directly from other apps by clicking a link.
app index
custom deep link
location extension
website deep link
Explanation:
A Deep link is a type of destination URL in an ad that takes people to a specific page in an app. For your destination URL in app engagement ads, you can use a link that just opens your app, or a deep link that will send people directly to a specific screen in your app. Tracking parameters are allowed for these links.
A custom deep link lets app users open the app directly from other apps by clicking a link. This link takes you directly to the YouTube app download page in Google Play.
Read more here: https://support.google.com/partners/answer/6209162
https://www.youtube.com/watch?v=FOKFt9liGNg