Kyle's making an HTML5 asset to add to his portfolio of other asset types. According to HTML5 best practices, when should the name of his app and a visible call-to-action be positioned at the center of his ad?

For HTML5 ads, placing the app name and a visible call-to-action (CTA) at the end of the ad is a best practice. This allows the user to engage with the ad's content and messaging first, building interest before being prompted to take action. Presenting the CTA too early (at the beginning or during the entirety of the ad) can be disruptive and may lead to lower engagement as the user hasn't fully processed the ad's value proposition. Placing it midway is also less effective than at the conclusion, as the ad's narrative or demonstration might not be complete. The end of the ad provides a natural and effective point for conversion.