AI explained: what everyday users need to know

What people mean by AI

When most people say AI today, they mean tools such as ChatGPT, Microsoft Copilot, Google Gemini and Claude. You type or speak a question, and a program writes back in normal language.

These tools have read a huge amount of text and learned the patterns in it. When you ask a question, the program predicts what a good answer should look like, one word after another. It doesn't look up a fact the way an encyclopedia does, and that's worth keeping in mind for everything that follows.

Where you may already be using it

You have probably met AI without noticing it. It suggests your next word on your phone keyboard. It sorts your photos by the people in them. Search engines now often show an AI summary at the top of the results, and Windows has Copilot built in.

What it's good at

AI is handy as a first draft or a patient explainer. Things it can do well include:

• Rewriting a letter or email so it sounds more polite
• Summarising a long document in plain language
• Explaining a confusing bill or instruction
• Suggesting a meal plan from what is in your fridge
• Translating a message, as a rough guide
• Helping you work through a tech problem, step by step

The trick is to treat it as a helpful assistant who sometimes gets things wrong. You stay in charge and you check the work.

Where it goes wrong

AI can make things up, and it sounds just as confident when it does. These mistakes are often called hallucinations. It may invent a book, a court case, a phone number or a product feature that doesn't exist.

So don't rely on AI alone for anything that matters. That includes medical questions, legal advice, tax and money decisions. Use it to work out what to ask, then check with your doctor, your accountant or an official website. If an AI gives you a phone number for your bank or your telco, check it on the company's real website before you ring it.

AI can also be out of date, and it may reflect the mostly American material it learned from. Ask about Australian tax, consumer law or Centrelink and you can get an answer that sounds right but belongs to another country.

Be careful what you share

Treat an AI chat a bit like an email to a stranger at a big company. Some services may keep your conversations or use them to improve their systems, depending on your settings and the service you use.

As a simple rule, leave these out:

• Passwords and PINs
• Bank or card details
• Your tax file number, Medicare number or passport details
• Private details about other people
• Confidential work documents, unless your employer has approved the tool

If you want to get help with a letter, take out names and account numbers first. It will work just as well.

How scammers are using it

Scam messages used to be easy to spot because of their bad spelling. AI has fixed that for them, so a polished email doesn't mean a genuine one.

Scammers can also clone a voice from a short recording, or create a fake video of a well-known person. You may have seen ads where a celebrity or politician appears to recommend an investment. Treat those as scams.

If you get a panicked call from a relative asking for money, hang up and ring them back on the number you already have. Some families agree on a code word for this reason. It feels a bit silly until the day you need it.

How to start, if you're curious

You don't need to pay anything to try these tools. Most have a free version. Go to the official website or app, and be wary of lookalike apps that charge a subscription.

Start with something low stakes. Ask for a birthday message or a recipe. Then follow up, just as you would in a conversation: "Make that shorter" or "Explain that like I am new to this." You'll soon get a feel for what it does well.

When to call a Nerd

If you would like someone to show you how these tools work, we can sit down with you and set up the safe, official versions on your computer or phone. We can also help small businesses work out sensible rules for staff, and we can check your device if you think you have installed a fake app. Book a visit and bring your questions.