--- slug: impression-pixel title: "How do I install the impression pixel?" category: messung locale: en updated: 2026-10-15 keywords: ["impression","pixel","delivery","ad server","1x1"] questions: ["How do I measure that a creative was served?","Measure impressions","Install an ad server pixel","Counting pixel"] url: https://bench.metrunio.com/en/help/impression-pixel --- # How do I install the impression pixel? **How do I measure that a creative was served?** The impression pixel is a 1×1 image you place in the creative or the ad tag. It counts delivery, not viewability; that is what the separate viewability tag is for. It measures from the Pro plan upwards; on the free Start plan Metrunio accepts no impressions. ```html ``` The token identifies the tracking element and is signed. [IMPRESSION_ID] and [CACHEBUSTER] are replaced by your ad server. Without a cache buster a proxy may serve the same image again instead of reporting a new delivery. `c=1` tells the pixel that the publisher’s consent is in place; the publisher’s consent tool or your ad server sets it. The tracking generator writes the placeholder [CONSENT] into the code for this, or a fixed 1 if you state that your ad server delivers only with consent. Without 1 the impression is not stored, and no view identifier is created either. With `c=1` the pixel sets a cookie on the measurement address that can later join the viewable impression to a visit to your shop. How that works, and where it does not, is explained under “How post-view is measured”. > **Note:** A served impression is not automatically viewable. Only what the viewability tag reported as visible counts for post-view. > **Note:** Metrunio measures impressions from the Pro plan upwards and during the trial. On the free “Start” plan the pixel still returns its image, but nothing is stored and it sets no view identifier; the diagnosis shows IMPRESSIONS_NOT_IN_PLAN. The click tracking URL measures on every plan. ## Also asked - Measure impressions - Install an ad server pixel - Counting pixel ## Related - https://bench.metrunio.com/en/help/viewability-tag - https://bench.metrunio.com/en/help/makros-adserver - https://bench.metrunio.com/en/help/post-view-messung - https://bench.metrunio.com/en/help/keine-post-view-touchpoints