TikTok Pixel is a JavaScript code installed on your site that tracks actions of users who come from TikTok Ads: page views, add-to-carts, purchases, form completions. The data is used for TikTok campaign optimization, remarketing, and building lookalike audiences.
With TikTok Pixel configured correctly, you can see that users who watched your 15-second video convert 3x better than those who watched under 5 seconds, letting you optimize your creatives.