A chatbot is a program you type to in plain language. You ask a question, the program answers in words, and you can keep the conversation going by asking follow-ups. The response is not a fact from a library. It is a prediction of what a helpful answer looks like based on patterns the program learned from a very large amount of text. That difference matters. Treat every answer as a first draft that a person still has to check.
Three free tools worth trying on a shared laptop or an older phone: ChatGPT at chat.openai.com, Google Gemini at gemini.google.com, and Microsoft Copilot at copilot.microsoft.com. All three work in a normal web browser. None of them require you to install anything. If your connection is slow, close other tabs and let the answer finish loading before you type again.
A useful prompt tells the tool who is asking, what you want, and any constraints. Instead of "help me write a letter," try "I am a parent in Cali. Write a short message in Spanish to my child's school asking for a meeting about a math grade. Keep it under 120 words and polite." The extra sentence changes the output more than most people expect.
Here is one worked example. Say a school sends home a notice in English about a schedule change. Paste the text into the chatbot and write: "Translate this into Spanish for a parent. Keep the meaning exact and mark any part where I should ask the school to clarify." Read what comes back next to the original. If a date or room number looks wrong, ask the tool to check that specific line, and then confirm with the school before you rely on it.
Another common use is drafting a message. If you are applying for a job at a bakery and want a short WhatsApp introduction, describe the job, your experience, and the tone you want. Ask for two versions. Pick the one that sounds like you and edit any word that does not.