AI glossary in plain English

Plain-English definitions for AI and everyday terms, including the symbols you see in AI chats.

Quick answer: what does *this* mean in an AI chat?

Asterisks around a word (*this*) add emphasis, like saying it a little louder. Quotes ("this" or 'this') mean these exact words: find them, keep them, or replace them. Two asterisks on each side (**this**) usually show up as bold. ChatGPT, Gemini, Copilot and Claude understand all of these, and plain words work too: "The most important part is the date."

Typing *'this'* or '*this*' when chatting to AI? One mark is enough. Our full answer, with examples you can copy, is in the guide:

Should I type *'this'* or '*this*' when chatting to AI? Quotes or asterisks, explained →

AI (Artificial Intelligence)

Computer systems that can perform tasks that usually need human thinking—like writing, translating, or recognizing patterns. In a text message, "AI" almost always means this, as in "I asked AI." (On many phones it looks just like the name Al.)

What does AI mean in text messages? →

Chatbot

A program you can talk to by typing or speaking. ChatGPT, Gemini, and Copilot are all chatbots.

Copy-paste prompt

A ready-made sentence or paragraph you can paste into an AI chat to get a specific kind of answer.

Data breach

When private information is exposed or stolen from a company or system without permission.

Disclaimers

Statements that clarify what content is and is not. For example, saying educational content is not tax advice.

Free tier

The no-cost version of a service. Usually has usage limits or slower responses compared to paid plans.

Generative AI

AI that creates new text, images, or audio based on what it has learned from training data.

Hallucination

When an AI makes up facts, names, or numbers that sound real but are not true. Always double-check important details.

Large language model (LLM)

The underlying technology behind chatbots. It reads and predicts language patterns to generate responses.

Multimodal

AI that can work with more than just text—such as images, audio, or video.

Phishing

A scam where someone pretends to be a trusted company to steal your passwords or personal information.

Prompt

The text you type or speak into an AI tool to get a response. Better prompts get better answers.

Quotes and asterisks (in prompts)

Quotes ("this") point the AI at exact words to find, keep or replace. Asterisks (*this*) stress a word; two on each side (**this**) usually show as bold. Plain words like "the most important part is..." work too.

Quotes or asterisks? Read the guide →

Markdown (** and # in AI answers)

A simple way of formatting text with symbols. AI chats use it: **this** means bold, a # at the start of a line means a heading, and a - starts a bullet. The app usually hides the symbols. If you see them after copying an answer, ask the AI for "plain text with no formatting."

Why AI answers show ** bold →

Rate limit

A cap on how many times you can use a service in a given period. Common on free tiers.

Red flag

A warning sign that something might be a scam, mistake, or problem.

SSN (Social Security Number)

A unique nine-digit number issued by the U.S. government. Never share it in AI chats.

Two-factor authentication (2FA)

A security feature that requires a second code—usually sent to your phone—in addition to your password.

Voice clone

AI that can imitate a person’s voice after hearing a short sample. Used in scams and entertainment.

Web browsing

A feature some AI tools have that lets them look up current information on the internet in real time.

FAQ

Should I type *'this'* or '*this*' when chatting to AI?

Neither is wrong, but you don't need both marks. Use quotes ('this' or "this") when you mean exact words, and asterisks (*this*) when you want to stress a word. Mixing them, like *'this'* or '*this*', won't confuse ChatGPT, Gemini, Copilot or Claude, but it doesn't help either. Our guide to quotes or asterisks when chatting to AI has examples you can copy.

What does *this* mean when chatting to AI?

Asterisks around a word (*this*) add emphasis, like saying the word a little louder. Quotes ("this" or 'this') mean exact words: find, keep, or replace these words. ChatGPT, Gemini, Copilot and Claude understand both, and plain words like "the most important part is..." work just as well.

Why does AI put ** or # in its answers?

AI chats format text with Markdown. Two asterisks on each side (**like this**) mean bold, and a # at the start of a line means a heading. The app usually turns these into bold text and headings. If you copy the answer somewhere else, you may see the symbols. Ask "Give me that as plain text with no formatting" to remove them.

Do I need special symbols or codes to talk to AI?

No. AI reads your message the way a person would. Type a normal sentence. Quotes and asterisks are optional helpers, not required.

What is a hallucination in AI?

It is when an AI states something false, like a made-up fact, number, or source, as if it were true. Double-check names, dates, money amounts, and citations before you rely on them.

What is a prompt?

A prompt is simply what you type or say to the AI. Clear prompts that say who it is for, what you want, and how long it should be get better answers.