❝Story05:30
NotebookLM Began as a Tiny 20% Project Inside Google Labs
Raiza recounts how NotebookLM grew out of a small internal project called 'talk to small Corpus' — the idea of using an LLM to interact with a piece of content. For a long time the only full-time person was a single engineer, with Raiza and eventually Stephen Johnson chiming in on the side. When they launched Project Tailwind they still had only about three engineers.
- Originated from an internal project called 'talk to small Corpus'
- For a long time only one engineer worked on it full-time
- At the Project Tailwind announcement they had just three engineers
- Even after launch they had fewer than ten engineers until recently
“notebook started as a 20% project as things kind of do at Google as they they used to and it's funny because I wouldn't even…”
“the only person who was actually like really full-time on this was the engineer working on the technology and everybody else was kind of just…”
#notebooklm#google labs#product origin#small teams
❝Story10:30
A Love of Voice Modality Sparked the Audio Overview Feature
The Audio Overview (the 'Deep Dive' podcast) came from noticing that NotebookLM's output was always text. Raiza, a heavy user of voice input and output, found that voice changed how she interacted with and even thought about the technology. Pairing that with fun was the way to let people quickly feel the value.
- NotebookLM could interact with text, but output stayed text
- Voice changed how Raiza interacted with and felt about the tech
- Voice even affected how she was thinking in real time
- Fun was treated as a core part of introducing the feature
“I'm actually a big fan of voice modality in general so I use a lot of voice input and Voice output I noticed when I…”
#audio overview#voice#product design#notebooklm
❝Story15:30
Her Husband Thought the AI Hosts Were a Real Podcast
To tune the hosts, Raiza listened to audio overviews over and over at home. Her husband, who doesn't know the details of her work, overheard them playing out loud and couldn't tell they were AI — he thought she was listening to an endless podcast about nothing. The team got the quality this good by listening to a lot of early, worse attempts and iterating.
- The realistic hosts come from the audio model plus Content Studio
- Early attempts sounded far worse; the team iterated by listening
- Raiza's husband couldn't tell the hosts were AI-generated
- He described it as an 'ever running podcast about nothing'
“I would listen to these audio overviews over and over at home and you know I get tired of wearing my headphones so I'm just…”
“he actually couldn't tell that they were AI”
#audio overview#ai voices#notebooklm#iteration
❝Story17:30
People Upload Their Resumes and Reviews for a Confidence Boost
One of the most surprising use cases is people feeding in their own resume or self-review notes and getting an audio overview that hypes them up. Googlers Raiza doesn't even know ping her to say it boosted their confidence — they walk into meetings feeling good because they heard the AI hosts get excited about their work.
- Users upload resumes and quarterly self-review notes
- The hosts describe them in a positive, hyped-up way
- Googlers report a genuine confidence boost before meetings
- The value is the surprise of not knowing what the hosts will say
“people are going into meetings feeling really good about themselves because they heard these hosts get really excited right about their their quarter and work”
#use cases#audio overview#notebooklm
❝Story24:30
Traction Signals: 60K Discord, Rising Retention, and a Flood of Businesses
Raiza shares directional traction: a 60,000-person Discord, strongly rising daily/weekly/monthly retention, and a shifting demographic from mainly educators and learners toward professionals. One company even scheduled a call to officially sanction employees using NotebookLM on their work Gmail, and business usage grew enough that she had to hire a business development person.
- About 60,000 people in the Discord server
- Daily, weekly, and monthly retention all trending up
- Audience shifting from educators/learners toward professionals
- A company asked to make employee use official; BD hire needed for business demand
“the number of businesses that we seen using notebook LM just has it's astronomical it's just like crazy”
#traction#retention#growth#notebooklm
❝Story36:30
'You're the Product': Studying Stephen Johnson's Knowledge Workflow
Raiza describes bringing bestselling author Stephen Johnson onto the team not to code or PM, but as a model to study. She watched how he densifies information and researches — including his Readwise with 8,000 quotes — with the goal of crunching that expertise down and bringing a 'super flow' to everyday people who aren't Stephen Johnson.
- Raiza told Stephen he himself was 'the product' to study
- She watched how he researches, thinks about, and densifies knowledge
- Stephen keeps a Readwise with roughly 8,000 quotes
- Goal: crunch expert workflows down and give ordinary people that 'super flow'
“Stephen I think you're the product I think it's you and I'm going to follow you around I'm going to watch everything that you do”
#stephen johnson#team building#knowledge work#notebooklm