At WWDC 2016
keynote, Apple introduced one of the new features in iOS 10 and that was Search
Ads which is to be released in this fall. Developers can now signup for the beta of Search Ads. Since, Apple released iOS 10 beta for developers last week and the members of the Apple Developer Program and Apple Beta Software Program running iOS betas may see Search Ads. If you currently have an iPhone or iPad app on the U.S. App Store, you can opt-in to include your apps in the Search Ads beta.

Search Ads is an efficient and easy way for you to promote your app within the
U.S. App Store search results, helping people discover or reengage with your
app at the very moment they are searching for apps like yours. Designed to give
users a safe search experience, Search Ads sets a new standard for delivering
relevant ads while respecting user privacy.

Developers can now signup for the beta of Search Ads. Since, Apple released iOS 10 beta for developers last week and the members of the Apple Developer Program and Apple Beta Software Program running iOS betas may see Search Ads.
Search Ads
gives every developer the opportunity to promote their app at the top of
relevant search results and lets customers download with a single tap. And
because Search Ads adheres to Apple’s privacy standards, user information
remains private.
Search Ads
provides a new way to increase awareness of your apps in App Store search
results. This is the easiest way to promote your app and you don’t
need to be a marketing expert. 

Developers can
now signup for the beta of Search Ads and for more details or to join the
search ads beta hit  the link below.
More About Search Ads