Marek Lecián
@mareklecian.bsky.social
Web & data #Analyst | #OnlineMarketing Geek | Freelancer 🇨🇿 🇪🇺 #measure #GA4 #GTM #sGTM #PiwikPro The questions may not make sense, but the answers do. I write posts in two languages English and Czech. linkedin.com/in/mareklecian/
How to Become a Web Analyst in 2026: Skills, AI & Tools mareklecian.cz/en/how-to-be...
How to Become a Web Analyst in 2026: Skills, AI & Tools | Marek Lecián
Learn how to become a web analyst in 2026: what to learn, which tools to use, how AI can help, and a practical 90-day plan to get started.
mareklecian.cz
Do We Still Need Google Tag Manager in the Age of AI? New article: mareklecian.cz/en/do-we-sti...
Do We Still Need Google Tag Manager in the Age of AI? | Marek Lecián
AI agents can now implement analytics tracking in code. So do we still need Google Tag Manager? A practical guide to when GTM helps and when it doesn’t.
mareklecian.cz
My review of the Gemini 3.5 Flash, Antigravity Cli, and Antigravity 2.0 Gemini 3.5 Flash... in a nutshell: Surprisingly fast, average in inteligence and above-average in price. mareklecian.cz/en/google-i-...
Google I/O 2026: Gemini 3.5 Flash, Antigravity CLI, and Antigravity 2.0 Through a Developer’s Eyes » Marek Lecián
Short version: I expected more from Google. Not because Gemini 3.5 Flash is an unusable model or because Antigravity has no direction. The problem is
mareklecian.cz
New Release notes for Google Tag Manager: Google tag gateway for advertisers via Google Cloud Platform is now in available in Beta
PF 2026: wishing you more signal than noise. May your measurement be gap-free, consents as high as possible, and your data flowing. Measure it right, optimize calmly, scale with confidence. May AI deliver real value, and may you feel calm and happy.
New feature in #GoogleTagManager The following variables have been officially added to #GTM: - Analytics Client ID - Analytics Session ID - Analytics Session Number This means you won't have to hack it anymore, which means there will be less chance of breaking it.
New Article Google Gemini 3.0 Pro: Hype vs. Reality - My Perspective. mareklecian.cz/en/google-ge...
Google Gemini 3.0 Pro: Hype vs. Reality - My Perspective. » Marek Lecián
I believe, however, that for many it will be a revolution, simply because they don't constantly try out all the new models. So, the difference between their
mareklecian.cz
New Article: What can be measured with AI tools? A complete guide to measurement, from bot visits to reputation in LLM mareklecian.cz/en/complete-...
What can be measured with AI tools? A complete guide to measurement, from bot visits to reputation in LLM » Marek Lecián
I’m writing this to organize my thoughts and have a reference for colleagues, but I’m happy to share it as well, so let’s get to it!
mareklecian.cz
New article! #GA4 #GTM I wrote a guide on how to measure citations from Google AI mode and #AIOverviews. 💡Why would you want to do this? The measured data contains texts cited by AI on your website, which can be used to optimize #SEO / #GEO, etc. mareklecian.cz/en/ga4-guide...
GA4 Guide - Measuring citations from Google Ai overviews and AI mode » Marek Lecián
So let’s break down what’s actually happening, why you should care, and how you can measure it in GA4.
mareklecian.cz
Google Gemini vulnerability, where all you need to do is send an email with hidden text to the owner with Gemini enabled in their workspace, and the user doesn't even have to open it for the attacker to run scripts via Gemini that read such an email. 0din.ai/blog/phishin...
Phishing For Gemini
A researcher that submitted to 0DIN demonstrated a prompt-injection vulnerability in Google Gemini for Workspace that allows a threat-actor to hide malicious instructions inside an email. When the rec...
0din.ai
🚀Google Analytics now ships default Lead Acquisition reports. Populate them by sending the new lead-gen events: - generate_lead - qualify_lead - disqualify_lead - working_lead - close_convert_lead - close_unconvert_lead via Measurement Protocol or CSV import. #GA4 support.google.com/analytics/an...
#GA4 #update Import cost data from Reddit Ads. This won't be for many people, but I believe it will make a few people happy. support.google.com/analytics/an...
Nový článek: Připravíte AI agentům bezbariérový vchod a nebo je pošlete ke konkurenci? #SEO #AI #agents #Accessibility mareklecian.cz/pripravite-a...
Připravíte AI agentům bezbariérový vchod a nebo je pošlete ke konkurenci? » Marek Lecián
Možná si říkáte, že přístupnost je noblesa pro nevidomé a do marketingové KPIs se nevejde.
mareklecian.cz
My New Article: AI-First Accessibility: Turn Legal Pressure into a Competitive Edge mareklecian.cz/en/ai-first-... #SEO #AI #agents #Accessibility
AI-First Accessibility: Turn Legal Pressure into a Competitive Edge » Marek Lecián
You might be thinking that accessibility is a noble gesture for blind users and has no place in marketing KPIs.
mareklecian.cz
#AI OpenAI Operator 2.0. In the normal chat interface, you put /agent and in the chat the agent will launch its own browsers and handle live stuff on the internet. Multiply smarter etc. Plus - 40 queries per month In EU you will need to use VPN openai.com/index/introd...
Introducing ChatGPT agent: bridging research and action
ChatGPT now thinks and acts, proactively choosing from a toolbox of agentic skills to complete tasks for you using its own computer.
openai.com
#MCP server for #GA4 Server that you connect to LLM and then you can talk about your data in GA4 and it will pull everything you need from GA4 servers. Cool stuff for me and I'm pretty excited, finally this could be a usable AI analytics tool for GA4. github.com/googleanalyt...
GitHub - googleanalytics/google-analytics-mcp
Contribute to googleanalytics/google-analytics-mcp development by creating an account on GitHub.
github.com
My new article: Do you use the word “ads” in your code? Get ready for an invisible website or part of it! Article about which words to avoid and in which places, but you part of the site not blocked by AdBlockers. mareklecian.cz/en/do-you-us...
Do you use the word “ads” in your code? Get ready for an invisible website or part of it! » Marek Lecián
So if you want to keep your UX (and your sanity) intact, keep reading. Today I’ll show you why ad-blockers hunt anything that smells like advertising, where
mareklecian.cz
Piwik PRO announces the end of its FREE plan in December, replaced by a supersized SME Business plan for 35 euros / month A good move in my opinion. Here my thoughts: www.linkedin.com/feed/update/...
Piwik PRO announces the end of its FREE plan in December. | Mehdi Oudjida
Piwik PRO announces the end of its FREE plan in December. It will be replaced by a paid Business plan with a 30-day free trial. This marks a turning point for Piwik PRO, which is shifting its acquis...
linkedin.com
Click-free shopping? AI agents change the rules of the game, will it kill advertising? Will it kill UX? mareklecian.cz/en/click-fre...
Click-free shopping? AI agents change the rules of the game, will it kill advertising? Will it kill UX? - Marek Lecián
People often underestimate that today’s “AI summaries” in search are only the gateway to a far deeper change: shopping and service management that will be handled for us by highly autonomous software ...
mareklecian.cz
Google AI Overviews and AI Mode: Top studies, analysis and recommendations (Update: 2025-06-22) (Live article, updated) mareklecian.cz/en/google-ai...
Google AI Overviews and AI Mode: Top studies, analysis and recommendations (Update: 2025-06-22) - Marek Lecián
A selection of the highest quality resources and studies on Google AI Overviews and AI Mode in Search. Find out their impact on SEO, website traffic and the future of organic results.
mareklecian.cz
I've kind of neglected it here, so a couple of articles I've written in the meantime. The impact of Google AI Overview on the Internet’s digital ecosystem mareklecian.cz/en/the-impac...
The impact of Google AI Overview on the Internet's digital ecosystem - Marek Lecián
AI and SEO is a big topic for me personally, so I felt it was my duty to write this article. I’ll warn you in advance that the article is roughly 47 standard pages long. But I think it’s important, be...
mareklecian.cz
How to create #GA4 traffic report from #AI tools. #PictureThis #guide Is there a lot of traffic from AI? No How is this AI traffic growing? Really fast. mareklecian.cz/en/how-to-cr...
AI WOW super HYPE... New image generator!!! New video generator!!! Will I use it? No. Because I had no use for it before, now or probably in the future. I like the cleverness, the precision, the vibe :) . I don't even need to count the letters in words.
#GA4 update - Percentage values in Google Analytics report tables - Missing session start notification - High not set rate notification
Google Ads has had a global #outage with ad serving for the last few days. Some Google ads accounts have stopped serving ads since 1.3.2025. The fault is not on your side . P.S. If your PPC guy doesn't know, tell him not to worry :) . www.seroundtable.com/many-google-...
