Meta Transitions Automotive Ads to ComScore Markets

Meta has announced that it will fully replace Nielsen’s Designated Market Area (DMA) data with ComScore Markets as the primary measurement provider for automotive model ads on Facebook and Instagram. The change takes effect June 22, 2026, with a transition period beginning March 23, 2026.

Starting March 23, automotive advertisers can update their vehicle offer feeds to include a new ComScore Market IDs column instead of traditional DMA codes. After June 22, campaigns still relying on Nielsen DMAs will be paused and require conversion to ComScore Markets to resume delivery. Meta will also remove Nielsen DMA options from all targeting and reporting tools at that time.

Both Nielsen DMA and ComScore Markets cover 210 geographic areas in the U.S., aligned with local TV markets. However, ComScore incorporates both linear television and digital media definitions, potentially offering more current and granular regional insights. Meta described the switch as a move toward a “more sustainable and scalable” long-term solution for performance and measurement.

The impact on most automotive campaigns should be minimal due to the similar geographic coverage. Advertisers targeting specific local markets – such as major metro areas, regional dealership clusters, or test-drive promotion zones – may see slight shifts in audience reach or delivery efficiency. The shift aligns with Meta’s ongoing efforts to refine ad measurement amid regulatory scrutiny and evolving privacy standards.