Ecommerce PPC Audit

A PPC audit for your ecommerce store finds exactly where money is being wasted and where campaigns are underperforming relative to their potential. Most stores that run PPC for more than six months without a structured audit are carrying 20–40% in preventable spend. This guide walks through every layer of an ecommerce PPC audit: account structure, tracking, bidding, feed quality, ad copy, and audience targeting.

Why Ecommerce PPC Audits Matter

Ad platforms are designed to spend your budget. Google’s default settings favor broad reach, automated bidding, and expanded match types that generate impressions and clicks, not necessarily revenue. Without regular audits, accounts accumulate waste silently: irrelevant search terms, disapproved products, dead ad groups, and bidding strategies that no longer match your business goals.

An audit resets the account to match current goals and catches structural problems that compound over time. A store running $20,000/month in ad spend with 30% waste is losing $6,000 every month. An audit pays for itself within days.

Step 1: Verify Conversion Tracking

Every audit starts here. If conversion tracking is broken, every optimization decision in the account is built on bad data. Check for:

• Duplicate conversions. Tracking the same purchase through both Google Ads and Google Analytics imports creates inflated numbers and confuses automated bidding.
• Missing value tracking. Tracking conversions without revenue values means you cannot calculate ROAS or use value-based bidding strategies.
• Cart abandonment firing as a conversion. “Add to cart” should be a micro-conversion at most, not a primary conversion action.
• Cross-domain tracking gaps. Stores using third-party checkout (PayPal, Stripe redirect) often lose the conversion when the buyer leaves and returns to the thank-you page.

Use Google Tag Assistant, Google Ads Tag Diagnostics, and a test purchase to verify that every purchase fires exactly one conversion with the correct revenue value.

Step 2: Audit Campaign Structure

Poor structure is the most common cause of inefficient ecommerce PPC. Look for:

• All products in one campaign. High-margin and low-margin products share a budget. You cannot prioritize spend toward your most profitable SKUs.
• Branded and non-branded terms in the same campaign. Branded keywords typically have 3–5x higher conversion rates. Mixing them inflates apparent campaign performance and makes budget allocation opaque.
• Dormant ad groups. Ad groups with zero impressions in 90 days are wasting crawl budget and cluttering the account. Pause or remove them.
• Single ad per ad group. Without multiple variants, you cannot test copy or let the algorithm optimize toward better performers.

Step 3: Review Search Term Reports

Search term reports show what people actually typed before clicking your ad. This is where most budget waste hides. Download the full search term report for the last 90 days and filter for:

• Terms with significant spend but zero conversions (add as negatives).
• Informational queries: “how to,” “reviews,” “vs,” “DIY,” “free” (typically non-buyers).
• Competitor brand names if you are not running a specific competitor campaign with appropriate landing pages.
• Irrelevant product categories that your keywords are triggering due to broad match or close variant matching.

Add found irrelevant terms to your negative keyword list immediately. For large accounts, this step alone recovers 10–20% of budget in the first audit cycle.

Step 4: Audit the Product Feed

Shopping campaign performance depends entirely on feed quality. Open Google Merchant Center and check:

• Disapproval rate. More than 5% of products disapproved indicates a systematic issue. Check the Diagnostics tab for the most common disapproval reasons.
• Title optimization. Are product titles front-loaded with the most important keywords? Generic titles like “Product XYZ-100” miss the search queries buyers use.
• Image quality. Lifestyle images and images with text overlays often get disapproved or underperform compared to clean product shots on white backgrounds.
• Price accuracy. Price mismatches between the feed and website trigger disapprovals instantly. Confirm prices sync correctly, especially during promotions.
• GTIN and MPN presence. Missing identifiers reduce product matching accuracy and often raise CPCs.

Step 5: Evaluate Bidding Strategies

Bidding strategy should match the campaign’s conversion history and business goal. Common mismatches found in audits:

• Target ROAS or Target CPA on campaigns with fewer than 30 conversions per month. The algorithm needs data to function. Underfed bidding strategies deliver erratic results.
• Maximize Clicks on conversion-focused campaigns. This drives traffic volume, not revenue. Appropriate only for brand awareness or feed traffic builds.
• ROAS targets set too aggressively. A 10x ROAS target on a campaign historically delivering 4x will cause Google to restrict impressions dramatically, cutting volume.

For each campaign, verify the bidding strategy matches the conversion data available and the business objective. Document current ROAS or CPA benchmarks before making changes.

Step 6: Check Ad Copy and Extensions

Responsive Search Ads (RSAs) now dominate Google Search. Audit your RSAs for:

• Ad strength rating. “Poor” or “Average” strength ads underperform. Add more unique headlines and descriptions to reach “Good” or “Excellent.”
• Asset performance labels. After sufficient impressions, Google labels each headline and description as Best, Good, or Low. Remove Low-performing assets and replace them.
• Pinned headlines. Overuse of pinned positions limits rotation and reduces performance. Pin only the one or two elements that absolutely must appear (legal, brand).

Also audit extensions: sitelinks, callouts, structured snippets, price extensions, and promotions. Missing extensions reduce your ad’s real estate and quality score.

Step 7: Review Audience and Remarketing Lists

Audience targeting layers can suppress waste or amplify high-intent traffic. Check:

• Are remarketing lists populated and large enough to deliver? Lists under 100 users (Display) or 1,000 users (Search) will not serve.
• Are past purchasers excluded from new customer acquisition campaigns? Showing acquisition ads to existing customers wastes budget.
• Are bid adjustments applied to high-value audiences? Customers in your cart abandoner list who return on a search should get higher bids.

Step 8: Analyze Geographic and Device Performance

Geographic and device data often reveal significant bid adjustment opportunities that most accounts ignore. Pull a geographic report for the last 90 days and look for:

• States or cities with consistently lower ROAS than the account average. Apply bid reductions of 15–30%.
• High-ROAS locations that are underbid relative to their value. Increase bids in these areas to capture more impression share.

For devices, mobile typically converts at 40–60% of desktop ROAS for ecommerce. If mobile is dragging down account performance, apply a bid adjustment of -20 to -40% for mobile devices. Do not exclude mobile entirely: it drives significant assisted conversions.

Step 9: Competitive and Impression Share Analysis

Search Impression Share shows how often your ads appeared versus how often they could have. Two key metrics:

• Lost IS (budget). Means your campaigns are running out of budget before the day ends. Increase budgets or reduce bids on lower-value terms.
• Lost IS (rank). Means your Quality Score or bids are too low to compete. Improve ad relevance, landing page experience, or increase bids on key terms.

Auction Insights shows which competitors are appearing alongside you. If a competitor is consistently outranking you on your highest-revenue terms, address that gap specifically rather than raising bids account-wide.

Turning Audit Findings Into a Prioritized Action Plan

Audits generate a long list of issues. Prioritize by impact, not effort. A simple framework:

• Fix first: broken tracking, high-waste search terms, disapproved products. These are actively costing money or preventing data collection.
• Fix second: bidding strategy mismatches, missing extensions, poor ad copy. These cap performance even when spend is efficient.
• Fix third: audience bid adjustments, geographic optimization, feed title improvements. These compound over time but are not urgent.

Run audits quarterly for established accounts and monthly for accounts spending over $15,000/month. PPC platforms change rapidly: match types evolve, new automation features roll out, and competitor landscapes shift. An audit from six months ago is already partially outdated.

FAQ

How often should you audit ecommerce PPC campaigns?

Accounts spending under $5,000/month benefit from a quarterly audit. Accounts spending $10,000–$50,000/month should audit monthly. Accounts above $50,000/month typically have dedicated management that performs weekly micro-audits alongside a full quarterly review. The cadence should increase when major platform changes occur, such as Google deprecating match types or launching new campaign types.

What does a PPC audit typically cost?

Agency PPC audits for ecommerce accounts typically run $500–$2,500 depending on account complexity and the depth of analysis. Some agencies offer audits as part of a pitch to earn management business. If you are evaluating an agency, an audit is a reasonable way to test their analytical depth before committing to ongoing management.

Can I run a PPC audit myself?

Yes, with the right tools and knowledge. Google Ads has a built-in Recommendations tab that surfaces some issues, but it is biased toward increasing spend. A manual audit using the framework above is more rigorous. Tools like Optmyzr, WordStream, and SEMrush Advertising Toolkit automate parts of the audit and flag anomalies faster than manual review.

What is the most common PPC waste found in ecommerce audits?

Irrelevant search terms from broad match keywords are the most common source of waste, followed by poor product feed optimization causing Shopping ads to show for wrong queries, and bidding strategies running on insufficient conversion data. Most accounts audited for the first time find 20–35% of their spend going to clicks with no realistic chance of converting.

How quickly do audit improvements show results?

Negative keyword additions and bidding corrections typically show impact within 7–14 days. Feed improvements take 3–7 days to process through Google Merchant Center and reflect in Shopping performance. Structural changes like campaign reorganization take 30–45 days for automated bidding to re-learn and reach stable performance. Expect a full 60–90 days to measure the complete impact of a thorough audit.