What is Cost Per Impression | Anura

Digital advertising is driven by numbers.

Costs, clicks, and conversations are constantly evaluated to determine the success and efficiency of ad campaigns. Among these metrics, Cost Per Impression (CPI) stands out as a key player. But what exactly is CPI, and why does it matter?

Think of CPI as the cost of getting your ad seen. Each time someone views your ad online, it counts as an impression. Understanding and optimizing CPI can significantly impact how effectively you reach your audience and manage your advertising budget.

What is Cost Per Impression?

Cost per impression (CPI) is an important metric in digital advertising. It essentially refers to the cost an advertiser pays every time their ad is viewed. Since impressions are typically measured by the tens of thousands, cost per mille (CPM) is often used instead. This refers to the cost an advertiser pays for every one thousand impressions.

Every advertiser wants their campaign to be a success. CPI provides crucial insight into the reach and efficiency of their strategy to help make improvements. Here are a few ways CPI can be used:

• Budget Planning: CPI allows advertisers to estimate how much they need to spend to reach their preferred audience size.
• Campaign Optimization: Tracking this metric empowers advertisers to compare performance across platforms and placements to optimize their ad budget and ROI.
• Benchmarking: Advertisers can use CPI to compare campaign performance against industry averages or competitors.

CPI is not just about tracking the number of impressions or pricing online ads. When analyzed besides other metrics like click-through rate and conversation rate, it provides valuable insight into the effectiveness of your advertising efforts.

How is CPI Calculated?

It is simple to find out how much your ad impressions cost. The easy-to-follow cost-per-impression formula goes:

The average cost per a single impression is often cents. That’s why CPM is typically used to determine the cost per thousand impressions.

Average Cost Per Impression Across Platforms

While the core formula remains the same for most platforms, cost per impression varies depending on where ads are displayed. For instance, Google’s cost-per-impression average is anywhere from fifty cents to $1,000 dollars per 1,000 impressions. While Shopify recently shared that Facebook ads cost approximately $9.88 per 1,000 impressions.

These numbers are constantly changing based on factors like seasonality, trends, target audience, and even ad placement. Both platforms also use real-time auctions to determine which ad gets shown. The competition and bids can change constantly, causing CPI to fluctuate.

Google and Facebook cost per impression can vary based on the time of day and day of the week in this highly competitive landscape.

How Ad Fraud Impacts Cost Per Impression

CPI, like other digital advertising metrics, is not immune to the effects of ad fraud.

Fraud can artificially increase the number of impressions, leading to inflated CPI.

Consider this example we’ve discussed before; Your company pays for 20 million impressions per month, with 25% of those impressions being bad (the industry standard bad impression rate), and pays $5 per thousand impressions. In this case, you might be losing $25,000 per month to ad fraud.

Wasted budget is not the only consequence of an inflated CPI. The incorrect metric also makes it difficult to measure the effectiveness of a campaign as you never know if your ads have reached real users. These worthless impressions reduce the overall return on your ad spend and result in wasted time and dollars.

Understanding Google Cost Per Impression (CPI)

When evaluating ad performance, many marketers zero in on clicks. But if you’re running display or video campaigns on Google, you should also keep a close eye on Google cost per impression. On Google’s Display Network and YouTube placements, CPI is often expressed via CPM (cost per thousand impressions), essentially the rate you pay for your ad to be viewed 1,000 times.

• Google uses an auction-based system where each ad impression is bid on in real-time. This means your CPI/CMP can fluctuate significantly depending on targeting criteria, competition, ad format, and placement.
• Current data from WordStream indicates that while detailed CPM figures for Google’s display network vary widely by industry and placement, the platform continues to show higher average spend per thousand impressions compared to many social networks.
• Using Google’s Help resources, advertisers can select Smart Bidding strategies like Target CPM or Viewable CPM (vCPM) so that they pay only when the ad meets certain visibility thresholds, helping control your Google cost per impression and boost campaign efficiency.
• To keep your Google CPI in check, pair precise targeting like custom audiences, contextual segments with robust ad verification tools to block invalid traffic and non-human impressions. When your spend reflects real human views rather than inflated “impressions,” the effectiveness of every dollar improves.

Optimize Your CPI

Ad fraud does not have to be your new normal.

Detecting fraud early is one of the best ways to protect your advertising efforts and regain trust in your digital marketing metrics. Anura uses a system which was built over decades to identify and put a stop to fraudulent traffic in real time.

Stop wasting money on traffic that will not convert. Try Anura today for free and see the difference for yourself.