An advertiser just started their web conversion campaign to drive users to their website. However, the conversion cost is fluctuating during the first two weeks of the campaign. Which is the likely cause of this?

The correct answer is that TikTok is initiating the learning phase to optimize the bid and targeting to best achieve the stated objective. When a new campaign starts, especially a web conversion campaign, the ad platform enters a learning phase. During this period, the system gathers data to understand how different targeting options, creatives, and bid strategies perform. This exploration often leads to fluctuating conversion costs as the algorithm tests various approaches to find the most efficient way to achieve the campaign's objective. The other options are less likely: bid price adjustments don't typically involve creative changes; creative resonance would generally stabilize or improve performance, not cause erratic fluctuations; and budget allocation across campaigns isn't the primary reason for cost fluctuations within a single new campaign's initial weeks.