How Google Autocomplete Works and How to Use It for Keyword Research

Updated October 31, 2026

Google autocomplete is the list of predicted searches that appears under the search box as you type. The predictions come from real searches by other people, which makes them one of the best free sources of keyword ideas.

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What is Google autocomplete?

Google autocomplete is the list of predicted searches that appears under the search box while you type. Pick one and you search for it without typing the rest. Google calls the suggestions "predictions".

How does Google autocomplete work?

Predictions are generated automatically by algorithms, not written by people. Google says they reflect real searches, including how often other people search for a term and whether it is trending. Several things shape what you see:

• What others search for: popular and rising queries that start with the same words.
• Language and location: the same text can give different predictions in different countries.
• Freshness: trending topics can appear quickly.
• Your own history: signed-in or past searches can personalize predictions.
• Policies: Google removes predictions that break its policies, such as hateful or dangerous ones.

Because predictions come from real searches, they are a free view of the exact words people use. That makes them valuable for finding long-tail keywords.

What is the difference between predictive search and autocomplete?

In practice they are the same feature. Google's own help pages say "autocomplete" and "predictions"; "predictive search" and "autosuggest" are informal names for the same box. Do not confuse it with related searches, which appear at the bottom of the results page, or with the People Also Ask box, which shows questions inside the results.

What is the difference between autofill and autocomplete?

Autocomplete predicts search queries. Autofill, for example in Chrome, fills in forms with details you saved, such as your name, address or payment card. They are separate features with separate settings.

Is Google autocomplete free?

Yes. Anyone can see and use the predictions in the search box at no cost. Google does not offer an official public API for Search suggestions, so keyword tools read the same public suggestions that appear in the browser. The Places Autocomplete API for addresses and places is a different, paid developer product.

How to use Google autocomplete for keyword research

1. Type a seed keyword and write down the predictions.
2. Add a letter after the seed ("protein powder a", "protein powder b" and so on) to uncover more phrases. This is often called alphabet soup.
3. Add question words and prepositions before or after the seed: what, how, for, with, without, near.
4. Repeat for each new phrase that looks relevant, and group the results by intent.

Doing this by hand takes a long time. A Google autocomplete keyword tool runs the whole loop for you and returns the list in seconds. Collect the questions separately, since they make good headings; see question keywords and People Also Ask.

How do I turn off Google autocomplete?

You cannot remove the box completely, but you can reduce it. In Google Search settings, switch off the option to autocomplete with trending searches, and pause or delete your search history to limit personalized predictions. In Chrome, the setting that autocompletes searches and URLs is under the sync and Google services options. Menus change often, so check Google's help pages if a setting has moved.

Frequently asked questions

Related tools and guides

• Long-tail keyword research tool: back to the main LongTailLab tool
• Google autocomplete keyword tool
• All keyword research guides