What is digital market share and how is it measured?

Last updated: 14 November 2026

Why return on ad spend isn’t enough

Return on ad spend (ROAS) tells you how much revenue each unit of spend brings in. It doesn’t tell you whether the market is growing or whether a competitor is moving faster than you.

Your ROAS can rise while your place in the market shrinks. Digital market share looks at that second question: where do you stand against competitors, and which way are you heading?

The four components

Nobody can see competitors’ sales data. But the traces they leave online can be seen. The DMS measures those traces in four places.

The DMS is the weighted total of the four components. In the example below the score comes to 33 out of 100.

Weights are set by sector and goal at the start of the work and then stay fixed. At launch visibility counts more; for steady revenue, conversion does.

Because the weights stay fixed, a change in the score comes from your place in the market, not from the method.

Measurement health score

A second number sits beside the DMS: the measurement health score. It shows how solid the data behind the score is. In the example it is 72%.

The health score doesn’t change the DMS; it tells you how far to trust it. If conversion tracking or your CRM isn’t connected the score drops, and fixing that comes first.

What the DMS is not

• It isn’t your share of sales. That can’t be calculated without competitors’ sales data.
• It isn’t a goal on its own. It is read together with return on ad spend.
• It isn’t a one-off report. Its value comes from being measured the same way every month.

How to grow your digital market share

Raising the budget isn’t the first step. The order is:

1. 1

   Fix measurement first

   If conversion tracking and your CRM aren’t connected, you can’t see which step worked.

2. 2

   Find the weakest component

   The lowest of the four scores is where money and effort should go first.

3. 3

   If visibility is low

   Find the searches and channels where your competitor shows up and you don’t, and move budget there.

4. 4

   If demand is low

   People need to know you before they search for you by name. Invest in video and content, and watch brand search.

5. 5

   If AI answer share is low

   Make sure the places AI draws on, your own site and sector publications, carry clear and current information.

6. 6

   If conversion is low

   Fix the page, the offer and the sales process before raising ad spend.

7. 7

   Measure again every month

   Use the same method, so that the change comes from the work you did.

Frequently asked questions

Is digital market share the same as market share?

No. Market share is your share of sales and can’t be calculated without competitors’ sales data. Digital market share is an index calculated from the traces left online.

How do you know competitors’ data?

We don’t know their sales, and nobody can. We measure the traces they leave online: impressions, searches and AI answers.

What should the DMS be?

There is no single right number. What matters is which way the score moves month to month and where you stand against competitors.

How often is it measured?

In the dashboard the DMS and its four components update every day. The AI questions are asked again every week.

Can I measure it myself?

You can see most components in your own accounts: Google Ads impression share, brand searches in Search Console, conversions in analytics. The hard part is combining them the same way every month. To get started, try the 2 minute check-up.