Google Ads Auction Insights for contractors: what the data actually means

Google Ads Auction Insights shows which advertiser domains entered the same eligible ad auctions as your business and how often your ads overlapped or ranked relative to theirs. It does not reveal their keywords, bids, budget, leads, booked jobs or profit. Use it to diagnose changes in competitive pressure—not to copy a rival or justify an automatic bidding increase.

A roofing owner may see a national lead marketplace with 70% impression share and assume it is “winning the market.” An HVAC manager may see a local franchise above the company 60% of the times both ads showed and demand a bid increase. Neither conclusion follows from the report alone. Auction Insights describes a subset of paid-search auctions; it does not measure total local demand or commercial success.

What does Auction Insights show?

Google’s Search report compares your performance with advertisers that participated in the same auctions. Depending on the available view, you can inspect data at account, campaign, ad-group or keyword scope. The selected scope matters: an account-wide table can blend emergency repair, replacement, maintenance, brand and unrelated territories into one misleading average.

The report identifies advertiser domains rather than a tidy list of local businesses. You may see directories, aggregators, manufacturers, franchises or Google-hosted destinations alongside other contractors. A business you regard as a major offline competitor may be absent because it did not overlap enough within the selected auctions or did not meet Google’s reporting threshold.

The six Search metrics, in plain English

Two denominators cause most confusion. Position above rate considers only occasions when both ads showed. Outranking share also credits occasions when your ad showed and the other advertiser’s did not. These measures can move in different directions without either being wrong.

Does overlap reveal a competitor’s keywords?

No. A 50% overlap rate means the other advertiser received an impression in half of the auctions where you received one. It does not disclose the search term, match type, keyword, audience signal or bid strategy that made either ad eligible.

That distinction matters because modern matching can connect a keyword with searches that do not use the same words. Separate campaigns can also enter similar auctions through different keyword themes. If competitor-name searches are the concern, use the search terms report and a deliberately isolated competitor campaign. Our guide to competitor keywords for contractors explains that test.

Why the competitor list keeps changing

Google runs an auction for each search. Eligibility and rank can vary with the query, location, device, time, budget availability, ad quality and other auction-time signals. Changing the report from all campaigns to “emergency plumber,” or from 90 days to last week, can therefore produce a different set of domains.

That variability is useful. If a new domain appears only inside a boiler-repair campaign in Manchester, it may be a real service-level rival. If it appears only in a broad national view, the operational importance is less clear. Compare like with like:

• one trade and service line;
• one genuine dispatch or sales territory;
• brand and non-brand traffic separately;
• mobile and desktop when behaviour differs;
• equivalent seasonal periods;
• the same campaign status and targeting settings.

When should a contractor act?

Start with the business symptom. If qualified calls and booked jobs are stable at an acceptable acquisition cost, a rival’s higher top-of-page rate may require no response. If profitable lead volume fell, use Auction Insights to test whether competitive pressure is one plausible contributor.

1. Confirm the change. Compare an equivalent period and account for seasonality, pauses and tracking changes.
2. Narrow the scope. Find the service, campaign, keyword group, location or device where the movement occurred.
3. Read coverage beside position. Review your impression share and lost share from budget or rank; Auction Insights alone does not identify the constraint.
4. Check the traffic. Inspect search terms and exclude jobs, DIY research, suppliers, out-of-area searches and wrong services.
5. Check the outcome. Compare connected calls, qualified opportunities, bookings, won jobs and gross profit—not only platform conversions.
6. Change one lever deliberately. That might be budget, bid strategy, keyword control, ad relevance, the offer, location targeting or the landing page.

A contractor losing impression share because the daily budget ends at 2 p.m. has a different problem from one whose ads are eligible all day but rank poorly. And neither problem means “beat every competitor.” The useful target is enough profitable visibility to fill the schedule with the right work.

What an agency should include in a competitive review

A screenshot of three rival domains is not analysis. Ask for a comparison with a defined scope and commercial context:

• which campaigns, services, locations and dates were included;
• whether brand traffic was separated;
• which metric changed and by how much;
• whether your own targeting or budget changed at the same time;
• what happened to qualified leads, bookings and cost per won job;
• the proposed action, expected trade-off and review date.

If an agency says a competitor “doubled its budget,” ask what evidence supports that claim. Auction Insights does not publish the other advertiser’s budget or spend. A rise in impression share may reflect broader eligibility, a different schedule, improved rank, fewer competitors, or changes to your own auctions.

Three contractor examples

Roof replacement: a storm-response advertiser suddenly appears with high overlap after a hail event. Before increasing bids, isolate the affected cities and roof-replacement terms. If booked inspections remain profitable and crews are full, paying for more absolute-top exposure may add cost without adding useful capacity.

Emergency plumbing: a directory has high impression share but low overlap with your ads. That can happen because its eligible auction set is broader. Do not treat its impression share as your lost opportunity; investigate your own eligibility, location coverage and hours.

HVAC installation: a franchise’s position above rate rises while your conversion rate falls. The combination deserves investigation, but not a bidding reflex. Review query mix, equipment-specific intent, financing copy and landing-page relevance before assuming rank is the cause.

US, Canada and UK considerations

The interpretation is the same, but campaign boundaries differ. US contractors may need to separate franchise territories, storm markets and Local Services Ads availability. Canadian accounts often need province, municipality and language splits. UK campaigns should reflect real postcode coverage and separate boiler, heating, drainage and emergency intent.

Do not compare a national advertiser’s aggregate presence with one local branch’s economics. Your company only needs to win the auctions that can become suitable, serviceable and profitable jobs.

Frequently asked questions