Search Impression Share
01 Definition
Search Impression Share meaning: The share of possible search ad impressions your ads actually received.
Search Impression Share is impressions you earned divided by the total you were eligible for on the Search Network. Google Ads reports it as a percentage. Lost share is split into loss due to budget and loss due to ad rank, which helps you see why ads did not show.
Also called
Why it matters
How Search Impression Share fits the work
Impression share reveals how much eligible demand you are missing, guiding decisions on budget increases or bid and quality improvements.
In context
Your ads were eligible for 10,000 impressions and received 6,500, giving a search impression share of 65%.
Practical note
Eligibility is estimated by Google, so the figure is directional. Check whether lost share comes from budget or ad rank before choosing whether to raise budget or bids.