Share of Search: The Cheapest Brand Metric You're Not Tracking

Brand tracking has a cost problem. Proper brand lift studies and tracker surveys are priced for enterprise budgets, run quarterly at best, and report with a lag. So most mid-sized businesses simply do not measure brand health at all — they invest in brand activity and wait for it to show up, eventually, somewhere in the sales line.

Share of search offers a different deal: a brand health indicator that is free, available weekly, comparable across competitors, and — this is the part that made the industry pay attention — predictive of market share movements months in advance. If you track one brand metric alongside your performance dashboards, it should probably be this one.

What Share of Search Is

Share of search is your brand's share of the organic search queries in your category: searches for your brand divided by total searches for all brands you compete with. Not paid search impressions — the volume of people actively typing brand names into Google. The logic is intuitive. When someone searches your brand by name, they are expressing memory and intent. When your share of those searches rises against competitors, your mental availability is growing; when it falls, you are being forgotten faster than you are being noticed.

The underlying data comes from Google Trends, which is free, offers weekly granularity, and reaches back to 2004 — meaning you can reconstruct years of brand history for your entire category this afternoon, something no survey tracker can offer at any price.

The Evidence That It Predicts

Share of search moved from curiosity to credible metric at EffWorks Global 2020, when Les Binet — one of the most respected effectiveness researchers in advertising — presented six years of analysis across the automotive, energy and mobile handset categories. His finding: share of search correlates strongly with market share and, crucially, leads it — movements in search share preceded movements in market share by months, up to a year ahead in some categories. Complementary IPA-supported research by James Hankins across thirty case studies in twelve categories found share of search explains a large majority of the variance in market share.

The metric behaves, in Binet's framing, like a fast, cheap proxy for share of voice and brand strength combined: advertising lifts it in the short term, and the portion that persists after a campaign ends reflects durable gains in brand memory.

Building Your Own Tracker

A workable share of search tracker takes a few hours to stand up.

• Define the competitive set honestly. Include every brand a customer might genuinely consider, including the large players you would rather exclude. The metric is a share, so the denominator is the analysis.
• Pull brand query volumes from Google Trends for your market (set the region to Australia, or your trading footprint). Compare all brands in one request where possible so values share a common index.
• Clean ambiguous brand names. If your brand name collides with a common word, use qualified queries or the "topic" entity in Trends rather than the raw term, and apply the same treatment to competitors.
• Smooth and trend. Weekly data is noisy; a rolling twelve-week average reveals the signal. Plot every brand's share on one chart, and annotate your own campaign periods and major competitor launches.
• Review monthly, alongside your performance data, not instead of it.

The comparison over time matters far more than any single reading. A stable 12 per cent share is a different story from a 12 per cent share that was 15 per cent a year ago.

Limitations Worth Respecting

Share of search is a proxy, and proxies have failure modes. Small brands with thin search volume get noisy, sometimes unusable data — the metric works best when category search volume is substantial. News events inflate searches without any commercial meaning: a product recall lifts share of search for all the wrong reasons, so pair the number with basic judgement about what is driving it. Categories with heavy retailer or marketplace intermediation (where people search "buy running shoes" rather than brand names) dilute the signal. And the relationship between search share and market share varies by category — Binet's own guidance is to calibrate against your category's history rather than assume a universal exchange rate.

None of this disqualifies the metric. It means share of search belongs in a triangulated view rather than serving as a verdict on its own — the same principle that applies to every measurement method we recommend.

Where It Fits in Your Measurement Stack

For businesses running performance branding — brand investment held to commercial standards of evidence — share of search fills a specific gap: the leading indicator between campaign activity and the lagging indicators of revenue and market share. Watch it weekly to see whether brand campaigns are registering; watch its post-campaign decay to see whether they are building anything durable; watch competitors' shares to see threats forming a year before they reach your sales data.

It will never replace lift studies or econometrics for proving causation. But at a cost of zero, it does not need to. It needs only to be tracked — and almost nobody in the mid-market does, which makes it an information advantage available for the taking. If you want help building brand measurement that holds up to the same scrutiny as your performance reporting, our performance branding team does exactly that.