Google Search's AI overhaul

In 2024–2025, Google rolled out AI Overviews in search results. AI answers user queries directly → fewer clicks to ads and links.

Advertiser-side changes:

• AI summary at the top → ads pushed down
• Some queries see "zero-click" increase
• Informational and comparison queries hit hardest

Ecommerce purchase queries (product name + "buy") are less affected.

Ad performance shifts

Industry-level impact (industry averages):

• B2B and informational search: CTR down 20–30%
• Ecommerce product search: flat or slight decline
• Local business: barely changed
• Travel and leisure: hit hard (AI recommends directly)

Decision: move budget to Meta?

When Google Search performance drops, 4 options:

1. Rebalance within Google

• Move to PMax (Search + YouTube + Display combined)
• Keep brand-protection keywords in Search
• Cut informational queries

2. Shift to Meta

• Move the inefficient Search budget to Advantage+ Sales
• Pivot from purchase intent to discovery-centric
• Lean into brand awareness

3. Cross-platform diversification

• Three-way split: Google, Meta, TikTok
• 15–30% each
• Channel risk diversification

4. Ignore the change

• Maintain existing structure
• Accept short-term variance
• Reassess after 6–12 months

Caution when moving to Meta

Directly porting search ads to Meta is risky:

• User psychology differs (active search vs passive discovery)
• CPA likely won't match for 1–3 months
• Learning phase restarts

Gradual shift recommended:

• Week 1: move 10% from Google to Meta
• Weeks 2–4: observe, expand to 20% if it works
• Months 2–3: up to 50% max

Decision checklist

Move recommended (3+ apply):

• [ ] Google Search CTR has been declining for 6+ months
• [ ] Meta Advantage+ Sales already running
• [ ] Pixel and CAPI fully set up
• [ ] Creative production capacity exists
• [ ] Interested in scaling brand awareness

Don't move if:

• Google Search performance stable
• Intent queries dominate (brand names, SKUs)
• Limited Meta ads experience
• Creative production is a bottleneck

What Meta can replace

What Google Search used to do:

• Capture purchase-intent customers → Meta can't directly
• Brand search → Meta hard to replace
• Comparison search → Meta partial replacement
• Informational search → Meta covers via brand awareness

What Meta can do:

• Trigger interest (expose unknown products)
• Drive return visits (retargeting)
• Brand familiarity (repeat exposure)
• Event traffic (seasonal promotions)

Practical strategies

Case 1: Small ecommerce ($2K/month, Google 70% / Meta 30%):

• When Google CTR declines
• Move 20pp to Meta Advantage+ Sales
• End state: Google 50% / Meta 50%
• Re-evaluate after 3 months

Case 2: B2B SaaS ($10K/month, Google 80% / Meta 20%):

• Google Search runs on brand and intent keywords
• AI Overviews impact relatively low
• Recommend no change

Case 3: D2C brand ($5K/month, Google 40% / Meta 60%):

• Already Meta-centric
• Can trim Google further
• Adjust to 30% / 70%

So what should you do?

Regular review routine:

• Monthly: Google Search ad CTR trend
• Quarterly: ROI comparison by platform
• Twice yearly: budget reallocation review

Cautions:

• No sudden shifts (both sides' learning gets shaky)
• Account for seasonality (year-end rebounds in search demand)
• Keep brand keywords on Google

The long arc

Google Search keeps reorganizing around AI. Ad inventory relatively shrinks, but:

• Purchase-intent queries remain valuable
• Brand and local search defensible
• Informational search continues to disadvantage advertisers

Increasing share toward discovery-based platforms like Meta and TikTok is the long-term trend.

Channel strategy and budget allocation are covered in Meta Ads Book 2.