The return on investment for digital marketing continues to improve, with dealership conversions surging nearly 40% in April as more stores lean on AI-powered automation to optimize budgets in real time, according to Fullpath.
The details: In its April 2026 Auto Intelligence Index, an analysis of retail trends across its nationwide network of franchised dealerships, the AI data company highlighted several findings pointing to stronger digital ad efficiency.
Dealership conversions jumped 37.3% year over year in April, while cost per lead fell 14.8% to its lowest point in a year.
Google Search remained the backbone of dealership digital ad spending, accounting for 64% of total investment.
Google Search also remained the most cost-efficient high-volume channel, with a cost per lead of about $28.50.
Performance Max conversions more than doubled in April, rising 119% year over year, while cost per lead fell more than 33%.
Zooming in: While new-vehicle inventory advertising still accounted for the largest share of spending, other categories gained traction in April as affordability pressures weighed on new-car purchases.
Certified pre-owned ad spending surged 69% year over year, while fixed ops investment rose 57.4%.
Used inventory spend climbed 27.8%, and “Dealer Near Me” campaigns rose 23.4%, while trade-in campaign spending fell 17% to $207,000.
Why it matters: As affordability pressures reshape consumer behavior, dealers appear to be reallocating more marketing dollars toward areas with stronger conversion potential as digital ad spending continues to grow.
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Between the lines: AI’s influence on lead conversion continues to expand, with emerging shopper behavior trends taking shape.
After a brief slowdown in early Q1, dealerships saw a 34.5% jump in traffic from AI chat sources in March 2026.
ChatGPT still accounted for the majority of LLM-driven traffic, though Google Gemini grew from a 1.5% share in Q4 2025 to 8.5% by April 2026.
Fullpath identified a “six-message threshold,” with shoppers who send a sixth message to an AI chatbot seeing conversion likelihood jump 6x to a 45.6% conversion rate.
Bottom line: Digital marketing efficiency appears to be improving, particularly for dealers embracing AI-driven tools and shifting spend toward higher-performing channels. As shopper behavior evolves, smarter budget allocation may become just as important as bigger ad budgets.
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