--- title: "Glossary of Metrics" slug: "glossary-of-metrics" description: "Explore key metrics like completion rates, click-through rates, and ad spend to optimize your video and audio advertising strategies effectively." tags: ["Completion Rate", "Listen Through Rate", "3rd Party Metrics", "Metrics", "ROAS"] updated: 2026-09-29T21:27:51Z published: 2026-09-29T21:27:51Z canonical: "help.quantcast.com/glossary-of-metrics" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.quantcast.com/llms.txt > Use this file to discover all available pages before exploring further. # Glossary of Metrics ### # **25% Completion Rate**: The percentage of video impressions that were played 25% of the way through. **25% Listen Through Rate**: The percentage of audio impressions that were played 25% of the way through. **50% Completion Rate**: The percentage of video impressions that were played halfway through. **50% Listen Through Rate**: The percentage of audio impressions that were played half of the way through. **75% Completion Rate:** The percentage of video impressions that were played 75% of the way through. **75% Listen Through Rate**: The percentage of audio impressions that were played 75% of the way through. **100% Completion Rate**: The percentage of video impressions that were played to the end of their entire length. **100% Completion Rate (Audible & Visible)**: The percentage of audible (volume above 0) and visible (at least 50% of the ad’s pixels were on screen) video impressions that were played to the end of their entire length. **100% Listen Through Rate**: The percentage of audio impressions that were played to the end of their entire length. **3rd Party Clicks**: Uses industry-standard IVT detection, as reported by a third party. **3rd Party Conversions**: The number of desired actions driven on your site, as reported by a third-party. **3rd Party Impressions**: The number of times your ads were delivered, as reported by a third party. **3rd Party Clicks**: Uses industry-standard IVT detection, as reported by a third-party. **3rd Party Conversions**: The number of desired actions driven on your site, as reported by a third-party. **3rd Party Completed Views for Video**: The number of completed views driven on your site as reported by a third-party. **3rd Party Measurable Impressions:** The number of times your ads were on screen and able to be measured, as reported by a third-party. **3rd Party Viewable Impressions**: The number of times your ads were viewable by IAB guidelines for counting in-view impressions, as reported by a third-party. **3rd Party Viewability**: The likelihood that an ad will be viewable as defined by the IAB, as reported by a third-party. ### A **Ad Spend**: Ad spend, or advertising spend, is the total amount a company allocates to advertising to promote its products or services. ### B **Budget Delivered**: (formerly called Spend) The total amount of the billable budget delivered to date on the Campaign/Ad Set. ### C **Clicks:** Quantcast uses two Clicks measurements: - **Clicks (General IVT)**: Uses industry-standard IVT detection. - **Clicks (Advanced IVT):** This measurement uses Quantcast's advanced IVT detection to report the most accurate click count possible. It is used to calculate click-through rates and other click-based metrics. **Click Results:** The number of results driven by clicks (Advanced IVT) on your site. **Completed Listens**: The number of audio ads played to the end by listeners. **Completed Views:** The number of times the video was watched to completion. **Completed Views (Audible & Visible)**: The number of non-skipped measurable impressions that were audible (volume above 0) and visible (at least 50% of the ad’s pixels were on screen) at the completion of the video. **Conversion Share**: The percentage of total site events driven by Quantcast ([Conversions / Total Conversion Events] * 100). > **Note:** Available from Oct 1, 2025 **Cost Per Household Reach:** The average Budget Delivered per household reached on your site. The formula is Budget Delivered divided by Household Reach **Cost Per Reach:** The average Budget Delivered per device reached on your site. The formula is Budget Delivered divided by Device Reach **Cost Per Result:** The average amount of Budget Delivered per Result on your site. The formula is Budget Delivered divided by Results. **CPCL**: Cost per completed listen. The formula is Budget Delivered (Audio) divided by Completed Listens **CPCV**: Cost per Completed View. The formula is Budget Delivered (Video) divided by Completed Views **CPCV (Audible & Visible)**: Cost per completed view where the audio was above 0 and at least 50% of the video pixels were visible at the point of completion. **CPM**: Cost per thousand impressions. **CTR**: The percentage of Clicks (Advanced IVT) out of the total number of Impressions. ### D **Device Frequency**: The number of times a device is used to access content or advertising during a measurement period. **Device Reach**: The unique count of devices used to access content or advertising during a measurement period. ### E **eCPM**: eCPM is the effective cost per thousand impressions, calculated as total cost divided by the number of impressions divided by 1000. For example, with a total cost of $3000 and 100,000 impressions, the eCPM would be $30. **Engaged Session**: An engaged session is a visit where a user actively interacts with your content. A visit is typically classified as an engaged session when it meets any of these criteria: - **Duration**: The user stays on the website for 10 seconds or longer. - **Interaction**: The user triggers a conversion or key event (e.g., watching a video ad, making a purchase, or filling out a form). - **Page Depth**: The user views two or more pages during the visit. ### H **Household Frequency**: The number of times a household accesses advertising content during a measurement period. **Household Reach:** The unique count of households that access advertising content during a measurement period. ### I **Impression:** An impression is a unit of measurement for the number of digital views or engagements of an advertisement. ### M **Measured Impression:** The number of impressions that could be measured for viewability. ### R **Results**: The number of desired actions driven on your site (conversions or traffic). This is the total of Click Results and View Results. Not applicable for Reach, Clicks, or Video Views. **Revenue**: The total amount generated from delivering your ads. **ROAS**: Return on Ad Spend. This is Revenue divided by Budget Delivered, expressed as a percentage. ### S **Survey Spend:** The total amount of the budget delivered on surveys. ### T **Total Conversions**: Total raw count of conversion pixel fires on the advertiser’s site, regardless of traffic source or attribution. ### V **View Results**: The number of results driven by views to your site. **Viewable Impression:** The number of measurable impressions that were recorded as viewable. **Viewability:** The percentage of measurable ads that were recorded as viewable, as defined by the IAB. The formula is Viewable Impressions divided by Measured Impressions ## Related - [Metrics Available in Report Builder](/metrics-available-in-report-builder.md)