11 Common PPC Errors Found in B2B Audits

As ad platforms lean harder into automation, the gap between truly skilled marketers and those merely riding the algorithm is becoming more visible , and more costly.

Managing paid ad accounts today bears little resemblance to the job just a few years ago. With tools like Meta’s Advantage+ and Google’s Performance Max reshaping the landscape, what constitutes expert account management has shifted dramatically. Yet, after conducting numerous B2B account audits for in-house teams and businesses transitioning between agencies, one pattern is undeniable: operators who genuinely understand these automated systems remain surprisingly scarce.

Despite all the technological firepower available , and more on the horizon , many smart B2B marketers continue making expensive mistakes. Here are the most common PPC errors I’ve uncovered recently on LinkedIn and Google.

LinkedIn advertising mistakes still happening

LinkedIn remains a powerhouse for B2B reach, but advertisers keep stumbling on basic fundamentals.

1. Running ads with no audience targeting It sounds unbelievable, but I still see this rookie error. Without targeting guardrails, your ads serve to entry-level staff, college students, interns, and completely irrelevant companies , not your ideal customer.

2. Failing to update audience targeting over time LinkedIn’s professional targeting is powerful but not perfect. For example, it’s common for sales titles and roles to creep into campaigns targeting “growth.” Account managers who don’t monitor and refine these settings waste budget showing ads to the wrong people.

3. Leaving all automated defaults on This isn’t a one-off slip. If you keep options like audience expansion enabled, your ads shift to cheaper, lower-quality inventory. Desired actions take the path of least resistance, often attracting the least qualified prospects.

4. Creating static creative and never rotating themes Every experienced LinkedIn advertiser knows the platform’s ad structure makes creative testing tough. You must proactively refresh your creative bank. Swapping minor elements won’t move the needle; you need real theme variations to stay effective.

Google Ads mistakes still costing money

Now for the issues that appear most frequently in our audits.

5. Using conversion-focused bid strategies without conversion data I’ve audited accounts running conversion-focused bidding with zero conversion data integration , sometimes not even specifying conversion actions. This forces the algorithm to chase the easiest actions and cheapest audiences, not quality leads.

6. Leaving Display and Search Partners enabled This simple oversight diverts budget from high-intent search inventory into reliably cheaper, lower-performing placements.

7. Skipping sitelink extensions Forgetting to use sitelinks means you cede valuable real estate and limit ways to appeal to users.

8. Continuing spend on non-converting keywords If you’re letting keywords run for months without conversions and not adjusting the ads, you’re literally flushing money away.

9. Running all campaigns in broad match only Similarly, you’re wasting budget if every campaign uses broad match with no phrase or exact match keywords in sight.

10. Running PMax for B2B without guardrails beyond remarketing Performance Max for B2B has become more viable thanks to useful new features. But if you’re not implementing basics like enhanced conversions and offline conversion tracking, turn those campaigns off , or hand them to marketers who can use PMax to improve lead quality. Otherwise, you’re buying junk leads.

11. Not testing AI Max Google is rapidly changing how ads are matched, served, and optimized. If you don’t test these systems early, competitors who feed Google more automation signals and learning data will leave you behind. Success with AI-driven campaigns depends on proper measurement, quality inputs, and ongoing oversight , responsibilities that haven’t disappeared with automation.

Automation still needs expert oversight

One critical layer across channels often gets overlooked: what happens after someone provides their information. A strong lead follow-up sequence is essential to campaign success, as is passing back the right data to tie performance to ad spend accurately.

Omitting this step does more than cloud your true ROAS. It also means you’re collecting less down-funnel data that could be fed back into platforms to teach algorithms to work harder for you.

Even experienced marketers make these mistakes. They’re often skilled at what used to be critical , like SKAGs and exhaustive negative keyword management , but they’re not adapting to use the controls still available in a more automated landscape.

These aren’t just one-off “oopsies” that cost brands money before being caught. To me, they’re flashing red lights signaling the account isn’t in safe hands, especially if multiple errors coexist or one has persisted over time.

Yes, account management involves much more automation than before. But these platforms still need quality inputs, proper measurement, and ongoing oversight to perform at their best. Keep that in mind before you decide a B-level resource and AI can save you money on fixed costs.