The factors that will determine where the Call to Action (CTA) button will appear in your ads are:
Ad Format: Non-Spark Ads, Spark Ads
Buying Type: Auction, Reservation
Type of Landing Page: App Download or Landing Page
In non-Spark Ads, the CTA button will appear:
At the bottom of your in-feed ad while it plays.
In the comment panel of your in-feed ad.
At the end of your in-feed video ad. The color of the CTA button will depend on the method used to purchase the ad.
In Spark Ads, the call to action button will appear:
At the bottom of your in-feed ad while it plays.
In the comment panel of your in-feed ad.
On the Profile Page of the Identity that published the Spark Ads. The text of the CTA will vary if it leads to an App Download Page or a Landing Page.
At the end of the video.
Learn about the Call to Action button.
Learn about the available timing of Call to Action (CTA) content and background color.