The digital advertising market is experiencing a distinct cooling trend in cost inflation. Although absolute CPCs remain relatively stable, year-over-year growth is consistently decelerating across all channels. This stabilization is anchored by Shopping CPC growth dropping from roughly 16 percent to 7 percent over four quarters, while Search growth has flatlined to zero.
The 365-day trajectory reveals a fiercely competitive but maturing e-commerce landscape. Initially, the relatively flat H2 2025 trends suggest stabilized auction floors. However, the November 2025 peak in Performance Max (PMax) aligns with expected Q4 holiday aggression. Conversely, the sustained Q2 2026 surge in Search CPCs challenges the assumption of a quiet spring, indicating a strategic pivot toward high-intent, bottom-of-funnel queries as advertisers seek guaranteed returns outside of automated campaigns.
While the line chart shows absolute CPCs rising in H1 2026, the YoY bar charts reveal a systematic deceleration in CPC inflation.
This complicates the short-term momentum of the line chart. It signals that while month-over-month costs are climbing, the aggressive year-over-year bidding wars of previous cycles have cooled. This is likely due to macroeconomic budget tightening and advertisers hitting strict efficiency caps.
The divergence in channel behavior highlights a fractured advertiser strategy: