At a glance
Real-time alert that fires when your Microsoft Universal Event Tracking (UET) tag appears to be silently failing. The classic shape is clicks still rising while measured conversions fall well below what those clicks would normally produce. This is dangerous on Microsoft specifically because Bing audiences skew toward older desktop users who are heavier on tracking-prevention browsers and ad blockers, so a UET regression can be partial and hard to spot by eye. Worse, Smart Bidding retrains on the degraded conversion signal within about a day, so a broken tag does not just under-report, it actively teaches the algorithm to bid wrong.
| What it watches | The relationship between live click volume and UET-measured conversions. When clicks behave normally but conversions drop far below the expected rate, the tag is the prime suspect. |
| Why clicks vs conversions | Clicks are reported by Microsoft’s auction system and do not depend on your site. Conversions depend entirely on the UET tag firing in the visitor’s browser. A divergence isolates a tracking fault from a demand change. |
| Why Microsoft is extra exposed | Bing’s audience skews desktop and older, with higher use of Intelligent Tracking Prevention and ad blockers. UET fires from the browser, so these audiences under-count more than Google’s. |
| The Smart Bidding risk | Microsoft’s automated bidding retrains on recent conversion data within roughly 24 hours. A tag that breaks Friday night can have Smart Bidding mis-optimising by Sunday, compounding the damage. |
| What “conversions” means | UET-tracked primary conversions in your Microsoft Advertising account. View-through is excluded by convention. |
| Bot / invalid traffic | Clicks are post-Click-Quality-filter. The alert is about real clicks that should have produced measurable conversions and did not. |
| Currency | Not currency-dependent. This alert is about event counts, not value, though a value collapse is the downstream symptom. |
| Cross-account aggregation | Per-customer-account. Each connected Microsoft Advertising account is watched separately. |
| Time window | Real-time. The alert is designed to catch a regression within a short window rather than at end of day. |
| Alert trigger | Clicks rising or steady while UET conversions run well under half their expected level for a sustained short period. Exact sensitivity is tuned per account. |
| Roles | owner, marketing, engineering |
Calculation
Calculated automatically from your Microsoft Ads (Bing) data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.Worked example
A US DTC apparel brand deploys a new site theme on the evening of 09 Apr 26. The theme bundle changes how third-party scripts load. The alert evaluates through the next morning.| Window | Clicks | Expected conversions | UET conversions | Conversion rate |
|---|---|---|---|---|
| Baseline (prior 7-day same hours) | 1,180 | ~41 | 40 | 3.4% |
| Evening of 09 Apr (post-deploy) | 1,210 | ~42 | 9 | 0.7% |
| Morning of 10 Apr | 640 | ~22 | 1 | 0.2% |
- Clicks holding while conversions vanish is the signature of a tracking break, not a demand drop. Real demand changes move clicks and conversions together. Here only the measured-conversion side fell, which points squarely at the UET tag.
- The theme deploy is the obvious trigger. Script-load order changes, consent-banner changes, and tag-manager edits are the usual causes. Roll back the deploy or restore the tag and re-test before anything else.
- Act before Smart Bidding retrains. Within about a day, automated bidding will treat this account as suddenly unprofitable and pull back bids on exactly the campaigns that were working. Pause automated bid strategy adjustments, or set affected campaigns to a manual or capped strategy, until the tag is confirmed firing again.
- Expect a knock-on ROAS alert. Because revenue is UET-measured, ROAS Dropped Below Threshold will almost certainly light up too. That is the same event seen from the value side, not a second problem.
- Check the commerce platform. If Shopify or BigCommerce orders are arriving normally while Microsoft conversions flatlined, the sales are real and only the measurement broke.
- Run UET diagnostics in the Microsoft UI to see whether the tag is firing on the conversion page.
- Compare against Google. If the Google Ads conversion tag held while Microsoft’s fell, the fault is in the Microsoft-specific tag, not in checkout.
Sibling cards merchants should reference together
| Card | Why pair it with UET Tag Tracking Broken |
|---|---|
| Microsoft Ads Clicks vs Conversions | The underlying comparison this alert is built on. Open it to see the divergence directly. |
| ROAS Dropped Below Threshold | The value-side symptom. If both fire together, the ROAS drop is a measurement failure, not lost demand. |
| Microsoft Ads Conversions Trend | Confirms the timing and steepness of the conversion drop against history. |
| Microsoft Ads Conversion Drop Alert | A related conversion-decline signal; helps separate a tag break from a genuine conversion slide. |
| Microsoft Ads All Conversions | If primary conversions fell but all-conversions held, the issue may be goal mapping rather than a dead tag. |
| Shopify Total Revenue | The truth side. Normal commerce orders during a Microsoft conversion flatline confirms a tracking break. |
Reconciling against Microsoft Advertising
Where to look in Microsoft Advertising: Microsoft Advertising → Tools → UET Tag, then open UET tag diagnostics and Conversion tracking → Conversion goals. Diagnostics tells you whether the tag is firing and whether the conversion goal is receiving events. The clicks and conversions columns under Reports show the same divergence this alert detects. Other Microsoft Advertising views that look related but differ:- Conversion tracking status shows a green/amber tag health indicator, but it can stay green during a partial failure where the tag fires for some browsers and not others. This alert catches partial failures the status badge misses.
- Smart Goals uses modelled conversions, which can mask a real tag break by imputing values. This alert watches measured UET conversions, so it sees the break that Smart Goals papers over.
| Reason | Direction of divergence |
|---|---|
| Real-time ingestion lag. Conversions can arrive a few hours after the click. | The most recent window may look worse than it truly is |
| Conversion goal mapping. If a goal is unmapped from a campaign, conversions show zero for that campaign even with a healthy tag. | Looks like a tag break but is a config gap |
| Partial-browser failure. The tag fires for some audiences and not others. | Ours flags it; the Microsoft status badge may not |
| Card | Expected relationship | What causes legitimate divergence |
|---|---|---|
shopify.total_revenue | Normal Bing-tagged orders during a Microsoft conversion flatline confirms the tag, not sales, broke | UTM gaps on the commerce side can also make Bing orders look low; check tagging before blaming the tag. |
google_ads.gads_conversions | A healthy Google conversion tag during a Microsoft drop isolates the fault to the Microsoft tag | A site-wide checkout outage would hit both at once. |