Marek Lecián

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.

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

New Article
Google Gemini 3.0 Pro: Hype vs. Reality - My Perspective.
mareklecian.cz/en/google-ge...

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!

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-...

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.

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...

Introducing GPT-5 Our smartest, fastest, most useful model yet, with built-in thinking that puts expert-level intelligence in everyone’s hands.

Official OpenAI post about GPT-5 openai.com/index/introd...

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...

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...

Drive Performance with Offline Conversion Import using the latest signals and features

Today Google livestream for this: marketingplatformacademy.withgoogle.com/events/drive...

🚀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...

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.

Nový článek: Připravíte AI agentům bezbariérový vchod a nebo je pošlete ke konkurenci? #SEO #AI #agents #Accessibility
mareklecian.cz/pripravite-a...

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.

My New Article: AI-First Accessibility: Turn Legal Pressure into a Competitive Edge
mareklecian.cz/en/ai-first-...
#SEO #AI #agents #Accessibility

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.

#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...

GitHub - googleanalytics/google-analytics-mcp Contribute to googleanalytics/google-analytics-mcp development by creating an account on GitHub.

#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...

#GA4 update
Item data import improvements
support.google.com/analytics/an...

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

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...

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...

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/...

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 ...

Click-free shopping? AI agents change the rules of the game, will it kill advertising? Will it kill UX?

mareklecian.cz/en/click-fre...

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.

Google AI Overviews and AI Mode: Top studies, analysis and recommendations (Update: 2025-06-22) (Live article, updated)
mareklecian.cz/en/google-ai...

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...

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...

#Google News / not news
Such a classic 3rd party cookies remain.
privacysandbox.com/news/privacy...

#GA4 #Update
It wasn't a bug, it's just been missing until now.

Chápu, že Tesla fanboys jsou náštvaní.
Ale to, že teď Mark Rober a JerryRigEverything vydali video nemá vliv, že díky Muskovému chování padají akcie poslední 3měsíce.
Marques Brownlee nemá povinnost jezdit Teslou, když má raději Porsche :) . Stačí když mu Tesla dodá 8let zaplacený Roadster 2.

YouTube video by PDS News Clips NEW FOOTAGE! Mark Rober Responds to Claims He Lied About Tesla Crash Video

Vyjádření od Marka www.youtube.com/watch?v=ndJu... cc @filiphouska.bsky.social , které vydal den před vydání článku, můžete přidat na konec článku. Protože tam vysvětluji všechno, za co dostává ve článku sodu.
Přídáte to tam? Děkuji @evelinabeniskova.bsky.social

- Už 2dny zpět bylo dáno ven Raw video, kde bylo vidět, že se autopilot vypne 0.5sec před nárazem.
- FSD má stejné senzory a zabrždění má stejné funkce jako autopilot.
Za mě lidar je lepší v některých podmínkách než kamery a proto ho měli dříve Tesly, než ho kvuli šetření zrušili.

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...

In a nutshell.
Is there a lot of traffic from AI? No
How is this AI traffic growing? Really fast.

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.

#AI In the Google Gemini app, all users now have 5 deepsearch queries per month.