Search Engine Privacy: What Your Search History Says About You

Additional resource for the lesson “Search Engines: Monitoring and Privacy” — Online Privacy course

You probably ask a search engine things you would not ask a friend out loud. The lesson showed that each of those questions can be recorded, and this resource is about search engine privacy in practice: what a search engine keeps when you search, where your search history lives, and what a private window does and does not change. In fifteen minutes you will read your own search trail and decide what happens to it next.

A. Why search engine privacy matters

Searches are unusual. You type them quickly, often before you have told anyone else what is on your mind: a new job, a move, a gift, a worry. Taken one by one, they say very little. Taken together, over months, they sketch what you care about, where you are and what you are planning.

A search engine needs your question to answer it, so it has to see that. What varies is what happens afterwards: whether the search is saved to your account, how long it is kept, whether it shapes what you are shown later, and who else might see it on a shared screen.

None of this is a reason to stop searching. It is a reason to know where the record is, so that keeping it becomes a choice.

What the sources say

The point is not new. In 2006 the Electronic Frontier Foundation (EFF), a digital rights organisation, asked the US Federal Trade Commission to investigate after AOL published three months of search queries from about 650,000 users. EFF’s lawyer put it plainly: “Search terms can expose the most intimate details of a person’s life.”

European data protection law treats the details that travel with a search as personal information too. The European Commission lists “an Internet Protocol (IP) address” and “a cookie ID” among its examples of personal data.

The search engines’ own help pages describe what they keep. Google explains that, with its search history setting on, it saves searches and results you viewed, along with information such as your device type and your general location from your device and IP address. Microsoft says that Bing collects your search terms along with other information, such as your IP address and location. Microsoft also says that, when you clear your search history, “some copies may be retained within Microsoft’s backup systems for a limited time”, and that it plans to keep data from signed-in users for up to five years to improve its products.

The US Federal Trade Commission (FTC), the national consumer protection authority, adds a useful correction about private browsing: it deletes your browsing history when the session ends, but it does not stop websites from seeing what you do.

B. Key concepts

Five ideas that make search engine privacy settings readable.

What a search records

More than the words you typed. A search can come with the result you clicked, the time, the type of device and an estimate of where you are. Google says it “will always estimate the general area that you’re searching from”, using signals such as your IP address, which is roughly based on geography.

Why it matters to you: That is why a history can say more than a list of words.

Search history in your account

When you are signed in, searches can be saved to your account and shown back to you as a history. Google calls this setting Search Services History, and it covers services such as Search, Maps, Shopping and News. Microsoft shows the Bing searches linked to your account on its privacy dashboard.

Why it matters to you: This is the part of the record you can see and control. If the setting names on your screen do not match, Google says your search history may still be controlled by its older Web & App Activity setting.

Personalisation

Using what a search engine knows about you, such as past searches or your location, to shape suggestions and some results. Google is careful to add: “For most of your searches, you’ll get the same results as anyone else who searches the same query from the same location.”

Why it matters to you: Personalisation is not the same as being watched, and it can be useful. At Google it is a separate setting from history, so when you review one, check the other too.

Pausing and auto-delete

Pausing stops new searches being saved to your account. Auto-delete keeps them for a period you choose, such as 3 or 18 months at Google, then removes them; you can also keep them indefinitely.

Why it matters to you: These are the two main dials. Google notes that turning the setting off does not erase what is already there: “Past history you don’t delete can be used even when you change this setting.” It also says it still collects some data that is not linked to your account.

Private windows

A browser mode, called Incognito in Chrome and a Private Window in Firefox, that forgets the session on your device when you close it. Mozilla is direct about its limits: “A Private Window doesn’t make you anonymous online.” It does not hide your IP address or your location, and sites, search engines, internet providers or your employer may still see some activity.

Why it matters to you: A private window protects your searches from the next person who uses your device. It does not hide them from the search engine, especially once you sign in: from then on, the site knows it is you for the rest of the session.

C. A practical example: Sara and the classroom screen

Sara, 28, is a teacher. A few months ago she opened her privacy dashboard for the first time and set her histories to delete themselves after a few months. That part felt settled.

Then one morning she connected her laptop to the classroom projector to look up a poem, and as she typed, the search box helpfully suggested her own recent searches. Among them, for thirty pupils to read: flats to rent in a city two hundred miles away. She had not told anyone at school she was thinking of moving.

Nothing terrible happened, and she laughed it off. Auto-delete had done its job: it removes old searches, not last week’s. That evening she wondered what her recent searches said about her.

Her first idea was a private window. Then she read that it clears her laptop’s record of the session but does not hide her searches from the search engine, and she usually searched while signed in anyway. The question was about her account, not her laptop.

What changed for Sara

• She read the last month of her search history as a stranger would. Most of it was ordinary, but a handful of searches, read together, told a clear story: a city, a rent budget, an unannounced move.
• She deleted those few and, since Google is moving search history to a new setting, checked that her searches were covered by the auto-delete she had chosen.
• She found the personalisation setting, separate from history, and read that it can draw on her account details, search history and general location. She kept it on for its useful local results, and will look again in a few months.
• For the classroom, she created a separate browser profile, signed out of her personal account, so the projector shows only school searches.

She still searches as much as before. She now knows what her searches say together, and the classroom screen shows only the classroom.

D. Try it yourself: a look at your search trail (15 minutes)

Four steps, with the search engine you use most. You do not need to change anything unless you want to.

Step 1 — Find where your searches are saved (3 minutes)

• Sign in to the account you usually search with and look for its activity or privacy page. At Google, this is My Google Activity (myactivity.google.com); at Microsoft, the privacy dashboard (account.microsoft.com/privacy).
• Check whether search history is on or off, and whether automatic deletion is set. Write both down.

Step 2 — Read one week of your own history (5 minutes)

• Scroll through the last seven days of searches.
• Note three things: one search you are glad is remembered (it saved you time), one you had forgotten, and one you would not want shown on a shared screen.
• Notice whether the entries also show places, times or devices.

Step 3 — See what the search engine uses about you (3 minutes)

• Look for the personalisation or recommendations setting, which at Google sits under Data & privacy in your Google Account, separate from history.
• Check whether the search app or website has permission to use your device’s precise location, or only your general area.

Step 4 — Choose your setting (4 minutes)

Choose one of these, and only one:

1. Set your search history to delete itself automatically after a period you choose.
2. Pause search history, so new searches are not saved to your account.
3. Delete the searches from step 2 that you would not want on a shared screen.
4. Turn off personalised recommendations, or keep them on knowingly.
5. Use a separate, signed-out browser profile on screens other people can see.
6. Keep everything as it is, now that you know where the record is and what it contains.

Option 6 counts as much as the others. A history can be genuinely useful, and keeping it on purpose is different from keeping it by default.

Already covered in the Online Security course

Privacy Focused Browser: The Setting You Use All Day
Shows how to set tracking protection, cookie isolation and HTTPS-only mode, so that less of your activity reaches advertisers in the first place.

E. Videos, articles and further resources

Institutional sources first, then the search engines’ and browsers’ own help pages.

Institutional sources

FTC (US) — How Websites and Apps Collect and Use Your Information
How tracking supports personalised adverts, what private browsing does and does not do, and how clearing your search history affects adverts.
https://consumer.ftc.gov/articles/how-websites-and-apps-collect-and-use-your-information

European Commission — Data protection explained
What counts as personal data, with examples such as an IP address and a cookie ID.
https://commission.europa.eu/law/law-topic/data-protection/data-protection-explained_en

Electronic Frontier Foundation — EFF Demands FTC Investigation and Privacy Reform After AOL Data Release
The 2006 case that showed how much a set of search queries can reveal about the people who typed them.
https://www.eff.org/press/archives/2006/08/14

Search engines’ documentation

Google Search Help — Find & manage Search Services History
What Google saves from your searches, how to turn the setting off, and how auto-delete works.
https://support.google.com/websearch/answer/17024959?hl=en-GB

Google Search Help — How Search works with your activity
How past searches shape suggestions, and why most results are the same for anyone asking the same thing from the same place.
https://support.google.com/websearch/answer/10909618?hl=en-GB

Google Search Help — Understand & manage your location when you search on Google
How Google estimates where you are searching from, including from your IP address.
https://support.google.com/websearch/answer/179386?hl=en-GB

Microsoft Support — How Microsoft stores and maintains your search history
What Bing collects with a search, how long it is kept, and what clearing your history does.
https://support.microsoft.com/en-us/accounts-billing/how-microsoft-stores-and-maintains-your-search-history

Browsers’ documentation

Firefox Help — How Private Windows protect you
What a private window clears when you close it, and what it does not hide.
https://support.mozilla.org/en-US/kb/common-myths-about-private-browsing

Links checked in October 2026. If an address changes, searching for the title on the organisation’s site usually finds it.

F. The Cyber Welfare Framework: Skills, Awareness, Secure Behaviour

This resource sits on the Awareness pillar at level FL1 – Basic: it turns the lesson’s idea that searching is monitored into a record you have read for yourself.

Skills

• Finding your search history in the account you search with.
• Using pause, auto-delete and manual deletion on purpose.
• Telling apart the history setting and the personalisation setting.

Awareness

• Knowing that a search can carry your location, device and time, not only your words.
• Understanding that turning history off does not erase what is already saved.
• Knowing that a private window hides your searches from your device, not from the search engine.

Secure Behaviour

• Keeping personal searches off screens that other people can see.
• Choosing a retention period instead of keeping everything by default.
• Rereading your search history from time to time, for example once a term.

G. Questions to sit with

• Which of your recent searches would you be happy to see on a shared screen, and which would you not?
• Is the convenience of a long search history worth what it records, for you?
• Where do you usually search while signed in without thinking about it?

H. What to do now

The recommendations (R) and security measures (MS) from the Cyber Welfare database that apply most directly here.

1. The record in your account

No database code fits this part, so in plain words: decide how long your search history is kept, and delete the entries you would not want others to see.

Minimum commitment: set your search history to auto-delete, or decide consciously to keep it as it is.

2. What travels with each search

• MS5 — Use a privacy-respecting browser such as Firefox or Brave, so that less of your activity reaches advertisers alongside your searches.
• R12 — Turn off location when you do not need it, so that searches use only your general area.

Minimum commitment: check whether your search app or browser has your precise location, and keep it only if you want it.

In short

• Search engine privacy starts with knowing that a search carries more than your words: the time, your device and your general location.
• Search history in your account is the part you can see, pause or set to delete itself.
• Turning history off stops new saving; it does not erase what is already there.
• A private window hides your searches from your device, not from the search engine.

Related resources in this course

• Alternative Search Engines: What Changes for Your Privacy
• AI Search Privacy: What Changes When You Ask Instead of Search
• Privacy Dashboard: What ‘Free’ Services Know About You

Discover more companion resources from the online courses of the Protect Your Digital Privacy programme.