Blog

Blog

Karel Huk

8 years in marketing. Agency, in-house, freelance. I know what keeps e-commerce store owners up at night, and I build custom strategies to solve it.

I go beyond PPC: analytics, automation, purchase funnel optimization. I occasionally write about it, and you can read my articles here.

Monitoring Merchant Center Disapprovals: 4 Signals to Watch

Monitoring Merchant Center Disapprovals: 4 Signals to Watch

Automation

Merchant Center shows how many products are disapproved. It never shows that the number changed. Four signals to watch, and a script that watches them for you.

September 5, 2026 · 6 min read
Google Ads Management Cost for an Online Store: 3 Fee Models

Google Ads Management Cost for an Online Store: 3 Fee Models

Google Ads

Three fee models, who each one suits and where it works against you. Plus the budget where paying for senior management starts to make sense.

September 5, 2026 · 6 min read
Consent Mode: Why Most of Your Conversions Are Missing from GA4

Consent Mode: Why Most of Your Conversions Are Missing from GA4

Analytics

Most visitors never give cookie consent. Here are two settings in GTM that look alike, and one of them switches your measurement off entirely.

September 5, 2026 · 7 min read
ChatGPT Ads management in practice: what I learned on three quarters of a million CZK

ChatGPT Ads management in practice: what I learned on three quarters of a million CZK

Strategy

I have managed ChatGPT Ads since April 2026, with roughly three quarters of a million CZK through the account. Five things that decide performance before creative does.

August 19, 2026 · 9 min read
Google Changes Bidding on August 17, 2026: How to Check Your Impact

Google Changes Bidding on August 17, 2026: How to Check Your Impact

Strategy

From August 17, 2026 Google stops letting budget-limited tCPA and tROAS campaigns beat their target. How to find out whether it hits you, plus a free script that does it for you.

July 30, 2026 · 4 min read
Google Bidding Change for Budget-Limited Campaigns

Google Bidding Change for Budget-Limited Campaigns

Strategy

From August 17, 2026, Google stops letting budget-limited tCPA and tROAS campaigns beat their target. I checked 42 campaigns in 16 accounts to see who this actually hits.

July 17, 2026 · 8 min read
PPC Audit: 7 Key Differences Between Paid and Free Audits

PPC Audit: 7 Key Differences Between Paid and Free Audits

Strategy

Considering a free PPC audit? Here are the 7 key differences from a paid one, and when investing in an independent audit is the smarter move for your e-commerce store.

May 29, 2026 · 9 min read
Misrepresentation in Google Ads: 10 Suspension Triggers Google Won't Explain

Misrepresentation in Google Ads: 10 Suspension Triggers Google Won't Explain

Strategy

Misrepresentation is the harshest penalty in Google Ads. Your account is suspended, and support won't say why. Here are 10 common signals and a step-by-step recovery plan.

May 27, 2026 · 10 min read
What a Supplemental Feed Can Do: 4 Use Cases That Don't Require a Developer

What a Supplemental Feed Can Do: 4 Use Cases That Don't Require a Developer

Google Shopping

A supplemental feed in Google Merchant Center handles changes in minutes that you'd otherwise wait weeks for a developer to implement. Here are four real-world use cases.

May 23, 2026 · 10 min read
Top 10 Merchant Center Disapproval Reasons and How to Fix Them

Top 10 Merchant Center Disapproval Reasons and How to Fix Them

Google Shopping

Account on fire, Shopping campaigns crashing. Here are the 10 most common disapproval reasons with a detailed step-by-step fix for each.

May 23, 2026 · 9 min read
AI Overviews and Conversational Attributes: Get Your Products into Google's AI Answers

AI Overviews and Conversational Attributes: Get Your Products into Google's AI Answers

Google Shopping

AI Overviews are changing search results. We ask longer, more conversational questions and rely less on keywords. Here's how to get your products recommended in AI Overviews.

May 23, 2026 · 9 min read
AI Max for Shopping Is Coming: Get Your Feed Ready Before the Competition

AI Max for Shopping Is Coming: Get Your Feed Ready Before the Competition

Performance Max

Google is rolling out AI Max for Shopping. A well-structured product feed pays off in PMax and standard Shopping campaigns today. Here are three things you can do right now.

May 13, 2026 · 11 min read
What Is a Product Feed, and Why Does Your Ad Performance Depend On It?

What Is a Product Feed, and Why Does Your Ad Performance Depend On It?

Product feed

A feed is the data file Google reads instead of your e-commerce store. Without it, you can't advertise in Shopping. With a quality feed, you sell more.

May 1, 2026 · 6 min read
Agentic Commerce: your customers won't be shopping alone for long

Agentic Commerce: your customers won't be shopping alone for long

Strategy

Gemini, ChatGPT, and other autonomous agents will soon do the shopping for your customers. This change is coming fast, and your e-commerce store probably isn't ready.

April 28, 2026 · 13 min read