How to fix: Call assets missing on Search campaigns
TL;DR
A Search campaign running without call assets — what Google rebranded from "call extensions" to "call assets" in 2022 [2] — strips the tap-to-call button from your mobile ads. For any business that takes leads or bookings over the phone (home services, local trades, healthcare, B2B sales, financial services), that single missing element silently caps mobile conversion volume. Google's own benchmark puts the CTR lift from call assets at roughly 10-15% on impressions where they serve [1]. The fix takes ten minutes: attach a Call asset at campaign level, set business-hours scheduling, enable the Calls from ads conversion action, and confirm on a mobile device once Google clears review.
Why it matters
Mobile is where intent meets immediacy. When a searcher on their phone types "emergency plumber near me" or "tax accountant for small business", they are minutes (not days) from buying. The form-fill path on a landing page introduces drop-off at every step — page load, scroll, form scan, field fill, validation, submit. Tap-to-call collapses all of that to a single thumb-tap.
Without call assets, the ad still serves on mobile, but the only call-to-action is the headline link to your landing page. Three things happen:
- Mobile CTR is lower than it should be. Google's published data on call asset performance shows a roughly 10-15% CTR lift on ads where the call asset serves [1]. That extra real estate also pushes competitors further down the SERP.
- You lose the highest-converting channel for service businesses. Phone leads convert at materially higher rates than form leads for most service verticals — the prospect has already picked up the phone, so qualification, scheduling, and close happen in one conversation instead of an email sequence.
- Smart Bidding sees an incomplete picture. With Calls from ads configured as a conversion action, every tracked call feeds the bid model. Without it, Smart Bidding optimizes only toward web conversions and undervalues queries from people who would have called.
Call assets, like all assets, are auction-eligible — Google's algorithm decides per-impression whether to show them based on predicted lift, query, device, and time of day [2]. You won't see them on 100% of impressions, but the impressions where they do serve are the ones most likely to drive a call.
How to fix
Total time: about 10 minutes per campaign, plus a 24-hour review window before assets serve live.
Open the Assets surface for the campaign. Navigate to Campaigns, select the Search campaign you're fixing, switch to the Assets tab, then filter by Call. Google moved this surface during the 2022 rename from Extensions to Assets — older muscle memory pointing at "Ads & extensions" will still redirect, but the canonical path is now Assets [2].
Click Add and attach the Call asset at campaign level. Account-level Call assets exist too and propagate to every Search campaign, but campaign-level gives you per-campaign scheduling control. Pick the level that matches your operational reality.
Enter the phone number. Use a verified business line — Google accepts toll-free numbers and standard local numbers, and rejects vanity numbers (1-800-FLOWERS-style), premium-rate numbers, and fax lines at review [1]. The number you enter must match the business being promoted; Google verifies this against the landing page domain and may pause the asset if it sees a mismatch.
Set Advanced options → Schedule to real business hours. This is the highest-impact configuration step and the one that most accounts skip. If your sales team answers 9-5 Monday-Friday, schedule the call asset to exactly that window. Outside the schedule, Google falls back to the default ad behavior — headline tap goes to the landing page — so you never strand a prospect on a ringing line at midnight.
Enable Calls from ads as a conversion action. Go to Tools → Conversions → New conversion action → Phone calls → Calls from ads. Set a minimum call duration that matches your real qualification bar (most service businesses use 60 seconds — under that, the caller hasn't engaged enough to count as a lead). This step is what feeds the call data to Smart Bidding; without it the asset still serves but the algorithm can't optimize toward it.
Save and wait for review. Google reviews new call assets in under 24 hours in most accounts. Status will move from "Under review" to "Eligible" once approved. Until then the asset doesn't serve.
Verify on a mobile device. Once review clears, search for one of your active keywords on a phone (use incognito or a colleague's device to avoid your own recent-click skew). Confirm the call button renders next to or beneath the headline. If it doesn't appear immediately, that's normal — assets are auction-eligible, not guaranteed on every impression.
Call assets pair naturally with other Search assets — see the sitelinks article, the callout assets article, and the structured snippets article for the full asset stack. Google's Ad Strength signal rewards Search ads that supply the full asset complement, not just one piece.
Common mistakes
- Forgetting to schedule business hours. The single biggest failure mode. A call asset live 24/7 routes mobile taps to a phone no one answers — the prospect hangs up after three rings, calls a competitor, and you paid for the click. Schedule the asset to your real coverage window.
- Using an unverified or mismatched phone number. Google verifies that the phone number on the call asset matches the business being promoted, typically by cross-checking the landing page. If your call center number doesn't appear anywhere on the site, the asset may be paused at review. Add the number to your site footer or contact page first.
- Skipping the Calls from ads conversion action. The asset will serve and produce calls, but Smart Bidding can't optimize toward calls it can't measure. Without the conversion action you forfeit the second-order lift on bid quality for call-heavy queries.
- Attaching at account level when campaigns need different numbers. A multi-region account where each campaign targets a different city should have campaign-level call assets with the matching local number, not one national number at account level. Account-level assets are convenient but undermine local relevance.
- Treating absence of call assets as harmless because "people don't really call anymore". True for B2C ecommerce and software signups; false for any service business. If you take any meaningful share of revenue from phone leads, this asset is mandatory.
- Expecting the call button to serve on every impression. Assets are auction-eligible. Google decides per-impression whether to show them. You should see the button on a meaningful share of mobile impressions in the Assets report after a few days — not 100%.
FAQ
Q: Will adding a call asset reset my Smart Bidding learning phase?
A: No. Adding assets is non-structural and doesn't trigger re-learning. You can add call assets to a stable campaign without disrupting the bid strategy.
Q: Do I need a Google Voice or special number, or can I use my regular business line?
A: Your regular verified business line works. Google accepts toll-free and standard local numbers from any carrier [1]. The number just has to match the business being promoted.
Q: What's the difference between call assets and Call-Only ads?
A: Call assets attach to a normal Search ad — the user can tap the headline to visit the site or tap the call button to phone you. Call-Only ads remove the website link entirely; the only action is to call. Call-Only is a separate ad format being phased out, with Google announcing 2027 deprecation; for new campaigns, use call assets on standard Responsive Search Ads instead.
Q: How do I track which calls came from which campaign?
A: Enable Calls from ads as a conversion action, then the Calls report (Tools → Conversions → Calls from ads) shows per-campaign call volume, duration, and area code. Pair that with your CRM call-tracking if you need to attribute revenue.
Q: Will the call asset show on desktop too?
A: Yes — on desktop it renders as a clickable phone number next to the ad rather than a tap-to-call button. On mobile it renders as a tap-to-call button. The mobile experience is where the meaningful CTR lift comes from.
Q: Is there a cost to running call assets?
A: There's no additional cost for the asset itself — you pay the same CPC whether the user taps the headline or the call button, and Google charges the same auction price [2]. The value is incremental conversions, not lower cost.