# Glossary: AEO, GEO and growth terms | Propel Source: https://runpropel.com/glossary Glossary # The terms, in plain words. Growth work for software is full of new labels: AEO, GEO, AI visibility, llms.txt. This glossary says what each one means, what the work involves, and where the evidence is thin. Each term links to the page where Propel does that work for you. - [Answer engine optimisation (AEO)Answer engine optimisation (AEO) is the work of getting your product named, and described correctly, when people ask an AI assistant a question.](https://runpropel.com/glossary/answer-engine-optimisation) - [Generative engine optimisation (GEO)Generative engine optimisation (GEO) is another name for getting your product into the answers AI models write.](https://runpropel.com/glossary/generative-engine-optimisation) - [AI visibilityAI visibility is how often AI assistants name your product when people ask the questions your buyers ask.](https://runpropel.com/glossary/ai-visibility) - [AI crawlersAI crawlers are the programs AI companies send to read web pages.](https://runpropel.com/glossary/ai-crawlers) - [llms.txtllms.txt is a plain text file at the root of a website that gives language models a short guide to the site: what it is and which pages matter, with links.](https://runpropel.com/glossary/llms-txt) - [Cold-email warm-upCold-email warm-up means starting a new mailbox or domain on a small number of emails a day and raising it slowly, so mail providers learn to trust it.](https://runpropel.com/glossary/cold-email-warm-up) - [One-click unsubscribeOne-click unsubscribe lets someone stop your emails with a single click in their mail app, without visiting a page or typing anything.](https://runpropel.com/glossary/one-click-unsubscribe) - [Show HNShow HN is the part of Hacker News where people share something they made that others can try.](https://runpropel.com/glossary/show-hn) - [Product-led contentProduct-led content is writing that teaches something by using your product to do it: a tutorial, comparison or launch post built around a real feature.](https://runpropel.com/glossary/product-led-content) - [Earned autonomyEarned autonomy is Propel's name for how much it may do on its own.](https://runpropel.com/glossary/earned-autonomy) - [Cold emailCold email is a first email to someone who has never heard from you, sent because you have good reason to think they have the problem you solve.](https://runpropel.com/glossary/cold-email) - [SPF, DKIM and DMARCSPF, DKIM and DMARC are three records in your domain's DNS that let mail providers check an email really comes from you.](https://runpropel.com/glossary/spf-dkim-dmarc) - [Bounce rateIn email, the bounce rate is the share of messages that could not be delivered, usually because the address does not exist.](https://runpropel.com/glossary/bounce-rate) - [Do-not-contact listA do-not-contact list, also called a suppression list, holds the people and addresses you must never write to again: those who unsubscribed, asked you to stop, or whose address bounced.](https://runpropel.com/glossary/do-not-contact-list) - [Email sequenceAn email sequence is a planned run of messages to one person: a first email, then a follow-up or two a few days apart if there is no answer.](https://runpropel.com/glossary/email-sequence) - [Daily sending limitA daily sending limit is the most emails one mailbox may send in a day.](https://runpropel.com/glossary/daily-sending-limit) - [Reply rateReply rate is the share of people you wrote to who wrote back.](https://runpropel.com/glossary/reply-rate) - [Ideal customer profile (ICP)An ideal customer profile (ICP) describes the kind of company and person most likely to buy and keep paying for your product: their role, the size and kind of company, and the problem they have now.](https://runpropel.com/glossary/ideal-customer-profile) - [robots.txtrobots.txt is a plain text file at the root of a website that tells crawlers which parts of the site they may read.](https://runpropel.com/glossary/robots-txt) - [Citations in AI answersCitations in AI answers are the pages an assistant names as its sources when it answers a question.](https://runpropel.com/glossary/ai-citations) - [Prompt injectionPrompt injection is an attack on an AI assistant through the text it reads: a web page, an email or a document that contains instructions, hoping the assistant will follow them as if they came from its user.](https://runpropel.com/glossary/prompt-injection) - [Human in the loop (HITL)Human in the loop means a person checks and approves an AI system's work before it takes effect.](https://runpropel.com/glossary/human-in-the-loop) - [Hold windowA hold window is the set time a piece of work waits, ready to go, before it goes out on its own.](https://runpropel.com/glossary/hold-window) - [GroundingGrounding means every claim an AI system writes is tied to a source it can point to: a page, a document, a line of code.](https://runpropel.com/glossary/grounding) - [Product Hunt launchA Product Hunt launch is a one-day listing of a new product on Product Hunt, where people browse, try and vote for what was launched that day.](https://runpropel.com/glossary/product-hunt-launch) ## Questions about these terms ### Why does a growth tool need a glossary? Because the field is full of new labels, and many of them are sold before anyone has measured them. Each term here says what it means, what it involves, and where the evidence is thin. ### Is AEO the same as GEO? In practice, yes. Both mean getting your product named, and named correctly, in the answers AI assistants write. GEO came from a 2023 research paper; AEO came from the search world. ### Which of these does Propel do for you? Measuring AI answers and fixing what is missing (Get found), writing to buyers safely (Get customers), and preparing posts and launches like Show HN (Get talked about). Each term links to the page where Propel does that work.