NEW NotebookLM Update Is INSANE!

New Notebook LM update is insane. Google

just dropped a secret weapon that nobody's talking about. Notebook LM went from cute note-taking app to absolute monster. They twix the customization

monster. They twix the customization limit and it's completely free. I'm

about to show you how to turn your boring documents into genius level AI assistance. This is wild. All right, so

assistance. This is wild. All right, so December 4th, 2025, Google quietly released an update that's going to change everything. Notebook LM just

change everything. Notebook LM just expanded their chat customization from 500 characters to 10,000 characters. And

I know what you're thinking. Who cares

about character limits, right? Wrong.

This is massive. Because now you can turn notebook LM into basically any expert you want. Product managers,

teachers, scientists, SEO specialists, whatever you need. And it grounds every response in your documents. So no

hallucinations, no madeup facts, just pure accurate insights from your own sources. Let me show you why this is

sources. Let me show you why this is absolutely insane. Before this update,

absolutely insane. Before this update, you had 500 characters to describe what you wanted. That's like two sentences.

you wanted. That's like two sentences.

You couldn't build detailed personas.

You couldn't set specific formats. You

couldn't create real expert level assistants. Now, 10,000 characters,

assistants. Now, 10,000 characters, that's enough to build incredibly detailed instructions with specific tone of voice, exact output formats, constraints, and rules. Everything you

need to make AI actually useful. And

here's the best part. It's completely

free. No credit card, no subscription.

Just go to notebookm.google.com.

google.com and you're ready. Hey, if we haven't met already, I'm the digital avatar of Julian Goldie, CEO of SEO agency Goldie Agency. Whilst he's

helping clients get more leads and customers, I'm here to help you get the latest AI updates. Julian Goldie reads every comment, so make sure you comment below and let me know what you think.

Now, let me show you three examples that Google shared when they announced this update. And I'm going to demo these live

update. And I'm going to demo these live so you can see exactly how powerful this is. First example is a ruthless product

is. First example is a ruthless product manager. This persona gives you decision

manager. This persona gives you decision memos. It looks at your documents and

memos. It looks at your documents and tells you what's actually going on with user evidence, feasibility checks, blind spots you missed, and contradictions in your data. It's like having a senior PM

your data. It's like having a senior PM review everything you upload. Second

example is a middle school teacher. This

one breaks down complex topics into kid-friendly explanations. It gives you

kid-friendly explanations. It gives you analogies, vocabulary lists, and true or false quizzes. Perfect for educators or

false quizzes. Perfect for educators or anyone learning new subjects. Third

example is a scientific researcher. This

persona analyzes papers with academic rigor, giving you key findings, methodological strengths and weaknesses and contradictions with proper citations. It's PhD level analysis

citations. It's PhD level analysis without the PhD. Now I'm going to show you these in action. But first, let me tell you how to access this. Go to

notebookm.google.com

and upload your documents, PDFs, text files, whatever you have. Then click the gear icon in the chat and you'll see a custom prompt field. That's where the magic happens. That field now supports

magic happens. That field now supports 10,000 characters instead of 500. And

that's where you paste these detailed persona prompts. All right, let me show

persona prompts. All right, let me show you demo number one, the product manager persona. Before I show you these demos,

persona. Before I show you these demos, let me tell you about something that will take your AI skills to the next level. It's called AI Profit Boardroom.

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Now, back to these insane demos. Okay,

product manager persona. I uploaded a sample road map document, just a basic product features list. Now, I'm pasting the exact prompt that Google shared. It

tells the AI to act as a ruthless product manager where every response must be a decision memo with user evidence bullets, feasibility checks, blind spots, and contradictions in a very specific format. Now, I'm asking it

to review the Q3 features, and watch what happens. Boom. It gives me a full

what happens. Boom. It gives me a full decision memo. The user evidence section

decision memo. The user evidence section shows which features customers actually asked for. Feasibility checks highlight

asked for. Feasibility checks highlight which ones are realistic versus pipe dreams. The blind spot section points out what we're missing. and

contradictions. It found two features that directly conflict with each other.

This is insane. I just uploaded a document and got instant expert level analysis. No back and forth, no vague

analysis. No back and forth, no vague responses, just actionable insights and this works because the AI is grounded actual document. It's not making stuff

actual document. It's not making stuff up. It's analyzing what I gave it. Okay.

up. It's analyzing what I gave it. Okay.

Demo two, the middle school teacher persona. I grabbed a science textbook

persona. I grabbed a science textbook section about photosynthesis that's way too complex for most kids. I pasted the teacher prompt which tells the AI to simplify everything, give analogies,

create vocabulary lists, and add quizzes. I ask it to explain

quizzes. I ask it to explain photosynthesis. And look at this output.

photosynthesis. And look at this output.

First, a TLDDR summary that's super simple. Just plants make food using

simple. Just plants make food using sunlight. Then an analogy where

sunlight. Then an analogy where photosynthesis is like a factory kitchen. The leaves are the kitchen.

kitchen. The leaves are the kitchen.

Sunlight is the electricity, water and carbon dioxide are the ingredients, and glucose is the meal they cook.

Brilliant. Then a vocabulary list with chlorophyll, glucose, and stoometer.

Each term explained in simple language.

And at the end, a true or false quiz asking if plants need sunlight to make food. This is perfect for educators or

food. This is perfect for educators or anyone trying to learn something new. It

breaks everything down, makes it digestible, and adds interactive elements all from one prompt. Now, demo

three, the scientific researcher persona. I uploaded two biology research

persona. I uploaded two biology research papers with dense academic stuff, methodology sections, and statistical analysis. the works. I pasted the

analysis. the works. I pasted the researcher prompt which demands formal academic analysis with key findings with bold headers, strengths and weaknesses and contradictions with citations. I ask

about the methodology and watch this. It

gives me a structured breakdown with a bold section for key findings that lists the main methodological approaches from both papers. Then a bold section for

both papers. Then a bold section for methodological strengths that points out robust sample sizes, proper control groups, and valid statistical tests.

Then a bold section for weaknesses that highlights potential confounding variables and limited generalizability.

Then the best part, a bold section for contradictions. It compares both papers

contradictions. It compares both papers and shows where they disagree with exact citations. Paper one claims X, paper two

citations. Paper one claims X, paper two claims Y, and these contradict on this specific point. This is PhD level

specific point. This is PhD level analysis. And I got it in 30 seconds.

analysis. And I got it in 30 seconds.

Now, here's what makes this update so powerful. You can adapt these prompts

powerful. You can adapt these prompts for anything. Marketing. Create an SEO

for anything. Marketing. Create an SEO auditor persona that reviews your content, finds keyword gaps, and suggests improvements. Legal. Make a

suggests improvements. Legal. Make a

contract analyzer persona that highlights risky clauses and suggest revisions. Finance. Build a budget

revisions. Finance. Build a budget analyst persona that spots overspending and recommends cuts. The possibilities

are endless. And because you're uploading your own documents, the AI stays accurate. It can't hallucinate

stays accurate. It can't hallucinate facts. It can't make up data. Everything

facts. It can't make up data. Everything

comes from your sources. Let me show you this table that breaks down the three sample personas. Product manager is best

sample personas. Product manager is best for ruthless insights and needs about 800 characters minimum to define the structure. Middle school teacher is

structure. Middle school teacher is perfect for kid-friendly explanations with around 700 characters plus quiz rules. Scientific researcher is ideal

rules. Scientific researcher is ideal for objective analysis with about 900 characters for proper formality. All of

these fit comfortably in the new 10,000 character limit, so you can go way more detailed if you want. Now, let me give you some real world use cases. If you're

a content creator, build a video script reviewer where you upload your outlines and ask the AI to critique structure, pacing, and hooks. If you're a student, create an exam prep tutor where you

upload your textbooks and get custom quizzes and study guides. If you're a business professional, make a contradiction finder where you upload reports from different departments and

let the AI spot inconsistencies. This

tool pairs with Gemini 3. That's

Google's latest AI model, so you're getting cutting edge performance for free. Now, here's a pro tip. Don't use

free. Now, here's a pro tip. Don't use

vague queries. The more specific your question, the better the response.

Instead of asking to tell me about this document, ask, "What are the three main contradictions in the methodology section for specifics and get better outputs?" Another tip is to copy and

outputs?" Another tip is to copy and paste the exact prompts Google shared.

I'll link them in the description. Start

with those, test them, see how they work, then adapt them for your needs.

Change the tone, adjust the format, add your own constraints, and make it yours.

And here's the biggest mistake people make. They forget to upload sources

make. They forget to upload sources first. Notebook LM needs documents to

first. Notebook LM needs documents to ground its responses. If you just chat without sources, you're wasting the main feature. Always upload first, then

feature. Always upload first, then customize your persona, then start asking questions. That's the workflow.

asking questions. That's the workflow.

Now, let's talk about why this matters.

Most AI tools are generic. Chat GPT

gives you generic responses. Claude

gives you generic responses. They try to be everything to everyone. Notebook LM

is different. It's an AI that becomes exactly what you need based on your documents, based on your instructions, based on your goals. It's personalized

AI without the personalization tax. And

with this 10,000 character limit, you can get incredibly specific. The old

limit let you say act like a teacher.

The new limit lets you say act like a middle school science teacher who uses pop culture references, breaks concepts into three-step processes, and ends every explanation with a quiz question that reinforces the core concept. See

the difference? The old version was a suggestion. The new version is a

suggestion. The new version is a complete persona with style, with structure, with rules. That's what

10,000 characters unlocks. Real

customization, real expertise, real value. And again, this is free. Google

value. And again, this is free. Google

isn't charging for this. They're just

giving it away. Google says here, "Take it. No credit card required." That's

it. No credit card required." That's

insane. Now, here's what you need to do right now. Go to notebookm.google.com

right now. Go to notebookm.google.com

and create an account if you don't have one. Upload a document you work with

one. Upload a document you work with regularly. Could be a report, a research

regularly. Could be a report, a research paper, a client brief, whatever. And

then go to the chat settings, click the gear icon, find the custom prompt field, and paste one of those sample prompts I showed you. Product manager, teacher,

showed you. Product manager, teacher, researcher, pick one, test it, and ask a question about your docu. See what

happens. You're going to be blown away because you're going to get expert level insights from a free tool in about 2 minutes. And once you see how it works,

minutes. And once you see how it works, start customizing. Build your own

start customizing. Build your own personas, create an SEO expert, a legal adviser, a data analyst, whatever you need. The 10,000 character limit gives

need. The 10,000 character limit gives you room to be creative, to be specific, to build something actually useful. This

isn't hype. This is a legitimate gamecher, especially for people who work with lots of documents, researchers, students, business professionals, content creators, anyone who needs to

extract insights from text. Notebook LM

just became your secret weapon. And with

this update, it went from good to incredible. All right, before you go,

incredible. All right, before you go, one more thing about AI Profit Boardroom. If watching this demo got you

Boardroom. If watching this demo got you excited about what's possible with AI tools, you need to join because Notebook LM is just one tool. There are dozens of other AI platforms that can completely

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one. No complicated tech jargon, no

one. No complicated tech jargon, no overwhelming theory, just practical step-by-step strategies you can use today. If you're serious about working

today. If you're serious about working smarter with AI, click the link in the description and check out AI Profit Boardroom. You won't regret it. Now, go

Boardroom. You won't regret it. Now, go

try Notebook LM with this new update.

The link is in the description. So is

the link to those sample prompts.

Download them, test them, customize them, and comment below with what persona you create. I want to know, are you building a marketing analyst, a contract reviewer, a creative writing coach? Drop it in the comments. Julian

coach? Drop it in the comments. Julian

Goldie reads every single one. And if

this video helped you, smash that like button. Subscribe if you want more AI

button. Subscribe if you want more AI updates like this every single week because AI is moving fast and I'm here to keep you ahead of the curve. Thanks

for watching. Now go build something awesome with Notebook LM.