Google Trends
Google Trends is a free Google tool that shows how interest in a given topic changes in the search engine. It uses a sample of actual queries typed into Google, anonymized and grouped by topic. It gives the result on a scale from 0 to 100, where 100 is peak interest for the chosen time and place. The data goes back to 2004 and can cover the last few hours. Since July 2025, Google has also been testing an API for retrieving this data.
What is Google Trends?
Google Trends is a tool for analyzing the popularity of searches on Google. It shows relative interest in a search term or topic over time and across regions.
According to Google Trends Help, the data is anonymized, categorized and aggregated. This lets the tool show interest in a topic worldwide or in a single city.
| Feature | Description |
|---|---|
| Creator | |
| Type | search trend analysis tool |
| Access | free, in the browser |
| Data source | a sample of queries typed into Google Search |
| Result scale | 0 to 100, relative values |
| Time range | from 2004 to the last few hours |
| API | alpha version since July 2025 |
Google Trends is not a poll. According to Google Help, a rise in interest in a topic does not mean the topic is “popular” or “winning”. It only shows that, for some reason, many people are searching for it.
How does Google Trends calculate data?
Google Trends does not show the number of searches, only a term's share of all searches. It converts the result to a scale from 0 to 100.
According to Google Help, each data point is divided by the total number of searches in the given place and time. Without this, the regions with the most searches would always come out on top. The results are then scaled from 0 to 100.
| Element | How it works according to Google |
|---|---|
| Sample | Trends uses a sample of searches, which is enough given billions of queries a day |
| Normalization | the result is divided by all searches in the given time and place |
| 0-100 scale | 100 is the highest interest in the chosen time and place |
| Value of 0 | too few searches to show data |
| Statistical noise | Google adds random fluctuations to protect privacy |
Simon Rogers of Google News Lab explained in 2016 that Trends uses two samples of data. Real-time data covers the last 7 days. The rest goes from 2004 to about 36 hours ago.
Google Trends filters out some searches. It leaves out queries typed by very few people, repeated searches by the same person over a short time and queries with special characters. It also leaves out searches made by Google products, e.g. AI Mode and AI Overviews.
What is Google Trends used for?
Google Trends is used to compare the popularity of search terms, track seasonality and find topics that are gaining popularity. It is used by, among others, journalists, marketers and SEO specialists.
According to Google News Initiative training, the tool lets you compare up to five search terms or topics at once. It also shows interest by country, region or city, plus tables of related queries and topics.
| Feature | What it shows according to Google |
|---|---|
| Comparison | up to five search terms or topics on one chart |
| Regions | interest by country, region, city or metro area |
| Top queries | the queries with the most searches in the chosen time |
| Rising queries | the queries with the biggest growth in interest |
| Breakout | growth of more than 5000%, usually for new search terms |
| Topics | group a search term with typos, abbreviations and versions in other languages |
Google News Initiative considers topics usually more reliable than single search terms, because a topic covers all variants of a query, including those in other languages.
According to Google Help, Trends differs from the search volume data for advertisers. Advertising data shows monthly and average search volumes, while Trends is used to analyze more granular, real-time data.
What is the Google Trends API?
The Google Trends API is an interface for retrieving Google Trends data automatically. Google announced its alpha version on July 24, 2025 on the Google Search Central blog.
| API feature | Description according to Google |
|---|---|
| Data scaling | consistent across requests, which allows results to be combined and compared |
| Time range | a rolling window of 1800 days, about 5 years |
| Freshness | data up to 2 days ago |
| Aggregation | daily, weekly, monthly and yearly |
| Regions | breakdown by region and sub-region according to ISO 3166-2 |
| Access | gradual, for a limited number of developers |
Consistent scaling is the most important difference from the tool's website. In the browser, each request has its own 0-100 scale, so results from different requests cannot easily be combined.
What are the limitations of Google Trends data?
Google Trends data is relative, based on a sample and does not always accurately reflect actual searches. Google recommends treating it as one of many data points.
| Limitation | What it means according to Google |
|---|---|
| No search volume | the 0-100 scale shows a share, not the number of queries |
| Different regions | the same value in two regions does not mean the same number of searches |
| Noise for small terms | single spikes may be noise rather than actual interest |
| Unusual activity | in rare cases the data may include automated searches |
| Not a poll | a rise in searches does not mean support or popularity |
Google Help recommends comparing less popular search terms with general queries, e.g. about food, celebrities or the weather. This makes it easier to judge the scale of a trend.
Frequently asked questions
Q.Does Google Trends show the number of searches?
No. Google Trends shows relative interest on a scale from 0 to 100, not the number of searches. Each data point is divided by all searches in the given place and time. A value of 100 means peak interest in the chosen period. Search volumes are given by other tools, e.g. the data for Google Ads advertisers.
Q.What does a value of 0 mean in Google Trends?
A value of 0 means that too few people searched for the term for Google to show data. So it does not have to mean that nobody searched for it. For terms with low search volume, Google also adds statistical noise to protect privacy. Single spikes on the chart may then be random.
Q.How far back does Google Trends data go?
Google Trends data goes back to 2004. According to Simon Rogers of Google News Lab, the tool uses two samples. Real-time data covers the last 7 days, and the rest covers the period from 2004 to about 36 hours ago. The alpha API covers about the last 5 years.
Q.How do topics differ from search terms in Google Trends?
A search term is a specific query typed into the search engine. A topic groups that query with its variants: typos, abbreviations and versions in other languages. According to Google News Initiative training, topics are usually more reliable than single search terms, because they cover all variants of a query, including those in other languages.
Q.What sources is this description based on?
How data is collected, normalized and filtered is described in the Google Help article “FAQ about Google Trends data”. The tool's features are presented in the Google News Initiative training “Basics of Google Trends”. The range of real-time and historical data is given by Simon Rogers of Google News Lab in a 2016 piece. Information about the API comes from a Google Search Central blog post of July 24, 2025.
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