Click share is a Google Ads metric that estimates the proportion of available clicks you actually received, out of all the clicks you could have won in the auctions your ads were eligible for. If you were eligible for auctions that would have produced an estimated 1,000 clicks had your ads always shown in the best position, and you received 300, your click share is 30%.
How click share works
Google estimates the maximum number of clicks available to you, based on the searches your products or keywords were eligible to appear for. It then divides the clicks you received by that estimate. The calculation runs at campaign, ad group and product group level, so you can see where you are winning and where you are leaving clicks to others.
Click share is best known in Shopping campaigns, where it is a standard competitive column alongside impression share. At the time of writing (October 2026), Google also reports click share for Search campaigns in some views. Whether you can see it depends on the campaign type and reporting level, so check the columns menu under competitive metrics in your own account.
It differs from impression share in a useful way. Impression share tells you how often your ad appeared when it could have. Click share accounts for position and appeal too: an ad that shows often but low on the page, or with a weak product image or price, will have a click share well below its impression share.
Why it matters
For an online shop running Shopping ads, click share gives a direct sense of headroom. A low click share on a profitable product group tells you there are clicks being taken by competitors that you could win with higher bids, a better price or stronger product data. A very high click share tells you that extra budget will buy few extra clicks, because you are already winning most of what is available.
It also helps explain changes that raw clicks cannot. If clicks fall in November and click share holds steady, overall demand dropped. If click share falls while demand holds, competitors have become more aggressive, which is common in the weeks before Christmas in UK retail.
Common mistakes
- Treating click share as an exact count. It is an estimate based on modelled demand, so use it for direction and comparison.
- Chasing 100%. The last few percentage points usually cost far more per click and per sale than they return.
- Looking at click share without profit. A product group with low click share and thin margins may be best left alone.
- Ignoring product data. Poor titles, images and prices drag click share down regardless of bids, which is why feed optimisation matters.
How to act on it
Add click share and impression share columns to your Shopping or Search reports and compare them by product group or campaign over a few months. Look for profitable areas with low click share: those are the best candidates for more budget or higher ROAS tolerance. Check whether the gap is caused by impression share (you are not appearing) or by position and appeal (you appear but are not chosen).
For position and appeal problems, improve product titles, images and pricing before raising bids. For impression problems, look at budget and bid limits. Reading competitive metrics like this, and deciding where extra spend will actually pay, is part of my PPC management service.