What's the difference between Spark Ads and a normal ad?

Let's define it clearly. A Spark Ad boosts a real, existing TikTok post (yours or a creator's, with their code) instead of an uploaded file.
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Why it matters: Spark Ads keep the likes, comments and follows the post already earned. Social proof carries over.
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They also send clicks to a real profile, which builds your account, not just a one-off ad.
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Normal (non-Spark) ads upload a video that lives only as an ad, no profile, no saved engagement.
For beginners, Spark usually wins because people trust posts that already have comments.
Try this: pick one organic post that got decent comments and run it as a Spark Ad. Watch how the existing comments warm up new viewers. Simple and powerful.