Impression Share Opportunity Matrix
Quantify the pipeline you lose to budget and bid-limited impression share.
At 45% impression share you're capturing $108,000/month but leaving ~$132,000 to competitors. Closing the gap is a budget-and-bid question, not a new-channel one.
Assumes incremental impressions convert at your current rate, top-tier impression share often converts a touch lower, so treat this as an upper bound.
About this calculator
Impression share below 100% is not just a report metric, it is a dollar figure sitting in your auction report, revenue you would capture if a competitor weren't winning the rest of the impressions. This calculator turns your current impression share and conversion volume into the revenue you are leaving on the table, so budget or bid decisions can be made against a number instead of a feeling.
How to use it
- Enter your current impression share from your search-terms or auction insights report.
- Enter your current monthly conversions and the value of each conversion.
- Read total available conversions (what 100% impression share would produce), missed conversions, and the missed revenue per month and annualized.
Methodology
Total available conversions is your current conversions ÷ your current impression share (as a decimal), the implied conversion volume the full available auction would produce if you captured every impression at your current conversion rate.
Missed conversions is that total minus what you are actually capturing today, and missed revenue is missed conversions × value per conversion.
The calculator flags anything below 60% impression share for attention, since that is the point where a large share of available demand is going uncaptured.
This assumes incremental impressions, the ones you are currently missing, convert at the same rate as the impressions you already win. In practice, the impressions you are losing tend to be lower-rank or lower-relevance placements that convert somewhat lower, so treat the missed-revenue figure as a reasonable upper bound rather than a guarantee.
FAQ
It is an upper-bound estimate. It assumes the additional impressions convert at your current average rate, but impressions you are currently losing to budget or rank limits often convert a bit lower than your best-performing placements, so expect the realized gain to land somewhat below this figure.
Not necessarily, chasing the last few points of impression share often means bidding into progressively worse placements at rising CPCs. Check whether the incremental CPA at higher impression share still clears your margin ceiling before committing more budget.
Check "lost impression share (budget)" versus "lost impression share (rank)" in Google Ads or the equivalent platform report. Budget-limited losses are fixed by raising spend; rank-limited losses need a bid, Quality Score, or ad relevance fix instead.
A monthly number can look small enough to ignore. Annualizing it puts the true, ongoing cost of under-owning impression share in the same terms as a budget or headcount decision, which is usually the comparison that actually gets the gap closed.