Return on ad spend, or ROAS, is the default way to judge advertising. For an online shop, where the ad click and the purchase happen in the same session, it is a reasonable default. For a car dealership it tells only part of the story.
Why ROAS falls short for cars
A car is rarely bought on the first click. A buyer may see an ad, look at the listing on a marketplace, drive past the lot, call to ask about the service history and come in for a test drive weeks later. Pinning that sale on a single ad is a simplification that makes the ad look either much better or much worse than it was. And the sale itself happens in your showroom, not on a website where an ad platform can see it.
So instead of chasing one number, it helps to look at a few that match how cars are actually sold.
1. Attention per car: views and clicks
The first question is simple: is each car being seen, and is anyone interested? How many people saw the ad for this car, and how many clicked through to it? A car with plenty of views and few clicks often has a price or photo problem. A car with both is one to follow up on.
This is exactly what LaLista shows in the dashboard: per car, how many people saw it and how many clicked through, updated every day. We deliberately show delivery figures like these, not financial ratios, because they are what we can measure honestly for every car.
2. Days on the lot
How long did a car stand before it sold? Your own stock system or sales records know this. Compare the time on the lot before and after every car had its own ad. If cars with steady advertising don't move faster over a few months, something in the chain isn't working: the price, the photos or the follow-up.
3. Enquiries and test drives, with a source
Not every enquiry is equal. A test drive is a much stronger signal than a form someone filled in. The simplest measurement is also the oldest: ask everyone who calls or comes in where they saw the car, and note it down. A few weeks of honest tally marks tell you more than most attribution reports.
4. The share of enquiries that doesn't come from marketplaces
What share of your enquiries comes through channels you control — your website, your phone number, your Facebook Page and ads — rather than through the marketplaces? Over time, a healthy dealership moves that share up. Advertising your own stock under your own name on Facebook and Instagram is one of the most direct ways to do that.
A word on ROAS
ROAS isn't useless, and if you run your own ad accounts it is worth knowing. But for a dealership the four numbers above are more useful, because together they describe the path from "seen" to "sold" rather than a single guess about it.
Keep it simple
You don't need a data team for this. Attention per car comes from your dashboard. Days on the lot come from your own records. Enquiries with a source come from a notepad next to the phone. Together they let you answer the question that matters — "is our advertising helping us sell cars?" — in a few minutes, with numbers that reflect a dealership rather than an online shop.
