What Is a Spark Ad?
A Spark Ad is a TikTok ad that boosts an existing organic post — yours or a creator's, via the creator's authorisation code — so the ad keeps the original post's likes, comments and social proof instead of starting from zero.
Why funnels use them
Spark is the most native format in the TikTok auction and the workhorse of creator-led performance: the creative already proved itself organically, and the funnel behind it (Instant Form, VSL or registration page) inherits that trust. Kronos's TikTok play library includes a Spark creator → VSL → application play.