How to Use Perplexity AI to Research Any Topic

Perplexity AI is a free AI-powered search engine that gives you direct answers with sources — instead of a list of links to click through.

In this guide (5 steps):

1.Open Perplexity
2.Type Your Question in Plain Language
3.Read the Answer and Check the Sources
4.Ask Follow-Up Questions
5.Use the Focus Feature for Specific Searches

Open Perplexity

~15s

In any web browser, go to perplexity.ai. You can use it without creating an account. For free users, you can search as much as you want. Creating a free account lets you save your search history.

Type Your Question in Plain Language

~23s

In the search bar at the center of the page, type a question the same way you would say it to a person. For example: "What blood pressure numbers are considered high for a 70-year-old?" You don't need special phrasing — natural questions work best.

Quick Tip

Be specific. "What are good exercises for someone with arthritis in the knee?" gets a more useful answer than just "knee exercises."

Read the Answer and Check the Sources

~17s

Perplexity shows a written answer, usually several paragraphs. Numbers in brackets like [1] [2] link to the sources it used. Click any bracket number at the right side of the screen to see the source website. Read those sources if you want the full original information.

Ask Follow-Up Questions

~15s

Below the answer, you can type a follow-up question in the same box — Perplexity remembers your conversation thread. For example, after asking about Medicare Part B, you could follow up with "What documents do I need to apply?" without starting over.

Use the Focus Feature for Specific Searches

~23s

Before searching, you can click "Focus" to limit results to specific types of content: "Academic" searches scholarly papers, "YouTube" searches video content, "Reddit" searches community discussions, and "Social" searches social media posts. For health questions, "Academic" can surface medical research.

Warning

Perplexity provides helpful summaries, but for medical, legal, or financial decisions, always verify the information with a qualified professional. AI tools can occasionally misstate or oversimplify complex topics.

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Perplexity AI is a search engine powered by artificial intelligence. Instead of showing you a list of blue links, it reads multiple sources and gives you a direct, written answer to your question — along with citations so you can verify the information or read more.

Think of it as the difference between asking a librarian a question versus walking into a library and having to find the answer yourself. Perplexity reads the books and gives you a summary, with footnotes showing which books it used.

This makes it particularly useful for practical research questions: "What are the side effects of metformin?" or "What's the best way to remove a stripped screw?" or "What do I need to apply for Medicare Part B?" You get a clear, organized answer instead of having to compare five different websites.

Perplexity is free at perplexity.ai and works in any web browser on a computer, tablet, or phone. There's also a free app. A paid "Pro" version offers more advanced features, but the free version handles most everyday research questions well.

Unlike some AI tools that only know information up to a certain date, Perplexity searches the live internet and can answer questions about current events, today's prices, recent news, and anything that changes frequently.

Each answer includes numbered citations in brackets, like [1] or [2]. Clicking those numbers shows you exactly which website the information came from, so you can go read the original source if you want more detail. This is what separates Perplexity from other AI chatbots — transparency about where the answers come from.

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