The difference between Google Autocomplete and People Also Ask is timing: one works while you type, the other after you search. Both seem to know what you are about to ask, so they get mixed up, and for keyword research the difference matters because each one shows a different moment in a search. This page is part of our guide to Google SERP features. If you want the full story on predictions alone, read our page on google autocomplete.
Side by side
| Google Autocomplete | People Also Ask | |
|---|---|---|
| When you see it | While you type, before you search | On the results page, after you search |
| What it shows | Predicted completions of your search, mostly short phrases | Full questions, each opening to an answer with a source |
| Google’s description | Predictions that “reflect real searches that have been done on Google” | “A cluster of questions that are related to what the user initially searched for” |
| What shapes it | Language, location, trending interest and your past searches, per Google | Not documented beyond “related”; it changes as you open questions |
| Shape of the data | A flat list that changes with every letter | A tree: each opened question adds children under it |
| Answers | None; it only finishes the search | Yes, with a credited source for each |
| Search volume | Not shown | Not shown |
| Best research use | Seed wording and common phrasings | Full questions, follow-ups and who answers them |
What Google says about Autocomplete
Google’s help page on how autocomplete predictions work calls it “a feature within Google Search that makes it faster to complete searches that you start to type.” Predictions “reflect real searches that have been done on Google,” and Google lists four things that shape them: the language of the query, the location it comes from, trending interest, and your past searches. The same page says autocomplete “doesn’t simply display the most common queries on a given topic,” and that Google’s enforcement teams remove predictions that break its policies.
In a 2018 post on Google’s blog, Danny Sullivan wrote that Google calls them “predictions” rather than “suggestions” for a reason: the aim is to help people finish a search they already had in mind, “not to suggest new types of searches to be performed.” The post also notes that popular searches in Google Trends “might not appear as predictions within autocomplete”, because of those policies.
What Google says about People Also Ask
Google’s Visual Elements gallery describes the box as a related questions group, “a cluster of questions that are related to what the user initially searched for (also known as ‘People Also Ask’).” When you expand a question, “they’re shown a featured snippet.” Google does not publish how it picks the questions. We look at what is known in how Google decides which questions to show.
The real difference: before and after
Autocomplete works on the search you have not finished. People Also Ask works on the search you have already run. That timing explains almost everything else.
- Autocomplete is about wording. It shows the common ways people phrase the start of a search. That is why it is short, and why it changes with each letter you type.
- People Also Ask is about the next need. Once someone has searched, the box shows what Google thinks they will want to know next. That is why it shows full questions, and why it grows as you open them.
Put another way: autocomplete helps you pick the seed. PAA shows you what grows from it.
A real example
We unpacked “google autocomplete” with PAA Box, our own tool, on 28 October 2026 (google.com, depth 1, questions only). It returned 12 questions. The first four were:
- How do I turn on Google AutoComplete?
- How does Google AutoComplete work?
- How much does Google AutoComplete cost?
- Why isn’t Google Search autofilling?
Look at the third one. Searchers do not pay for the predictions in the Google search box. That question most likely comes from developers who add Google’s address autocomplete to their own apps and sites, and its children point the same way: “Is Google Autocomplete address free?” and “Is Google Maps completely free?”. Typing “google autocomplete” into the search box would show you completions of that phrase. The PAA box showed us that the phrase serves two different audiences, and which questions belong to each. That is the kind of thing only the question tree reveals.
The same run also showed “What is the difference between autofill and autocomplete?” and “What is the difference between predictive search and autocomplete?”. In our runs, comparison questions like these turn up often in PAA. Autocomplete, which mostly finishes the start of a phrase, is a less reliable place to find them.
How to use both in keyword research
- Start in the search box. Type your topic slowly and note the predictions. Add question words like “how”, “why” and “can”. Pick the predictions that read like real tasks or problems as your seeds.
- Run each seed and open the PAA box. Record each question and the question it appeared under. PAA Box does this on the results page you already have open, at a depth you choose, and downloads a CSV with the parent for every row.
- Compare the two lists. A phrase that appears as a prediction and as a PAA question is a strong candidate. A PAA question with no matching prediction is often a follow-up need, which makes a good section rather than a page.
- Check demand separately. Neither feature shows numbers. Use Google Trends to compare phrasings and Search Console to see what you already appear for.
Two other boxes on the results page add more seeds: people also search for, which can appear after you click a result and come back, and the related searches list at the bottom of the page. For more free sources and how they fit together, see how to find what people are searching for.
Things to watch with each
- Autocomplete is personal. Google says your past searches shape predictions. Research signed out, or in a fresh browser profile, for a less personal view.
- Autocomplete is filtered. Google removes predictions that break its policies, so a missing prediction does not mean nobody searches it.
- PAA drifts. Each question you open re-seeds the box, and the deeper you go, the further it wanders. See why People Also Ask drifts off topic.
- Neither is a popularity chart. Being shown means connected, not biggest. If you want the questions most people ask on your topic, read the most asked questions on Google.