How ads are matched to geographic locations
- AdWords allows you to target customers in the geographic locations that you've chosen, so your ads can appear in the areas in which you do business.
- Location can be determined either by someone’s physical location, or locations that they’ve shown an interest in (known as locations of interest).
- You can use your advanced location options to choose whether you’d like your ad to appear for someone’s physical location, locations of interest or both (which is the default setting).
The AdWords system uses a number of factors to determine someone’s physical location and whether to show your ad. Whenever possible, we determine physical location based on someone's computer or mobile device location, or other methods.
- IP address:
Location is typically based on the Internet Protocol (IP) address, which is a unique number assigned by Internet Service Providers to each computer connected to the Internet.
If a device is connected to a Wi-Fi network, we may detect the Wi-Fi network's IP address to determine physical location. If a mobile device is connected to a mobile carrier's proxy server, we may use the carrier IP to determine the device's location.
- Device location:
Depending on a user's location settings, we may be able to use a precise location for advertising, based on one of these sources of location data:
- GPS: Accuracy varies depending on GPS signal and connection.
- Wi-Fi: Accuracy should be similar to the access range of a typical Wi-Fi router.
- Bluetooth: If Bluetooth and/or Bluetooth scanning are enabled on a device, a publicly broadcast Bluetooth signal can provide an accurate indication of location
- Google's mobile ID (mobile phone mast) location database: Used in the absence of Wi-Fi or GPS. Accuracy is dependent on how many mobile phone masts are located within an area and available data, and some devices don't support mobile ID location.
If the AdWords system detects geographic areas that someone is interested in, we may show appropriate ads targeted to that area or surrounding areas (known as location of interest).
Some of the ways that we might detect a location of interest are based on:
- Terms used in searches that indicate a location.
- Past searches that indicated a location of interest.
- A person’s past physical locations.
- The content and context of a website where an ad is displayed. Bear in mind that the mention of a location on a page doesn't always indicate an interest in that location.
- Searches on Google Maps or Google Maps for Mobile.
- If someone sets a custom location for Google search results.
- If a person uses a country-specific domain, such as google.fr(France).
On the Google Display Network, we may infer a location associated with a page or site when we believe that it will be useful for targeting your ads. A location mentioned on a page may not always indicate an interest in that location. For example, someone who is reading news about Birmingham isn’t necessarily interested in ads for Birmingham florists. Similarly, we might infer an interest in a location, even if that location isn't specifically mentioned on a page, but the context of the entire site indicates an interest in that place.
Location of interest isn't restricted to either a person's country or to the Google search domain the person is searching on. For example, if someone in Paris, France, searches for Los Angeles taxi on google.fr (France), we'll still identify Los Angeles as a location that they're interested in.
Advanced location options
The default advanced location option in AdWords will use both physical location or location of interest to determine where ads can appear. You can update your advanced location options at any time.
When you target an area, we may also show your ad to customers in nearby, closely related areas that normally couldn't be targeted because of low population, insufficient data about the geographic area or because that level of targeting isn't available. For example, if you target the city of Manchester, we may also show your ads to searchers in nearby suburbs of Manchester.
Ads on Google.cn and Google.com.hk
- Users in Hong Kong who search on either google.cn or google.com.hk will see ads targeted at Hong Kong.
- Users outside Hong Kong who search on either google.cn or google.com.hk will see ads targeted at China.
- How to update your advanced location options to reach the right customers.
- Get tips on how to focus more of your online advertising efforts in the geographic areas where your business is most successful.
- Find out how to measure your geographic performance.