What is impression share in Google Ads, and can we improve it?

 Impression Share in Google Ads is a metric that represents the percentage of impressions your ads have received compared to the total number of impressions they were eligible to receive. It essentially measures how often your ads are being shown in relation to how often they could potentially be shown based on your targeting settings, budget, and bid.

Formula for Impression Share:

$$\text{Impression Share} = \left( \frac{\text{Impressions Received}}{\text{Impressions Eligible}} \right) \times 100$$

For example, if your ad is eligible to appear 1,000 times in a day but only gets 800 impressions, your impression share would be 80%.

Types of Impression Share:

• Search Impression Share: The percentage of impressions your ad received out of the total impressions available in the search network.
• Display Impression Share: The percentage of impressions your ad received out of the total available impressions on the Google Display Network.
• Lost Impression Share (Budget): The percentage of impressions your ads could have received but were lost due to budget constraints.
• Lost Impression Share (Rank): The percentage of impressions your ads could have received but were lost due to low Ad Rank (a combination of bid, quality score, and expected impact of extensions).

Can You Improve Your Impression Share?

Yes, you can improve your impression share by addressing several factors:

1. Increase Your Budget: If you're losing impression share due to budget limitations (as shown by "Lost IS (Budget)" in the Google Ads reports), increasing your budget can help. More budget allows your ads to show more often.

2. Improve Your Ad Rank: If your impression share is lost due to "Lost IS (Rank)", improving your ad rank will help. To do this, you can:

   • Increase your bids: This will make your ad more competitive in the auction.
   • Improve your Quality Score: Google rewards higher-quality ads with better placements at lower costs. Quality Score is based on your ad relevance, landing page experience, and expected click-through rate (CTR).
   • Use relevant keywords: Ensure that your keywords are highly relevant to the ad copy and landing page to improve Quality Score.

3. Expand Keyword Coverage: By adding more relevant keywords, you increase the chances that your ads will show up for a wider set of searches.

4. Optimize Targeting: Make sure that your ad targeting (location, device, audience, etc.) is broad enough to capture more potential impressions, but also precise enough to be relevant to your audience.

5. Improve Ad Extensions: Utilizing all available ad extensions (sitelink, callout, structured snippets, etc.) can boost your Ad Rank, making your ads more competitive and likely to show more frequently.

6. Use Automated Bidding: Switching to automated bidding strategies like Target CPA, Target ROAS, or Maximize Conversions can help you optimize your bids and budget allocation in real time, improving your chances of winning more impressions.

7. Refine Your Ads: Having more compelling, relevant, and high-quality ads can improve your CTR, which also positively affects your Quality Score and ad rank, thus improving impression share.

8. Monitor and Adjust Campaign Settings: Sometimes adjusting targeting parameters, such as geographic locations, scheduling, or devices, can help you capture more impressions without increasing the budget.

By focusing on these factors, you can increase your impression share, allowing your ads to show more often to a relevant audience. However, it's essential to find the right balance between improving impression share and maintaining the effectiveness and efficiency of your campaigns, ensuring that your ads reach the right users at the right cost.