When you have Spotlight Suggestions enabled in Safari, your search queries, the Spotlight Suggestions you select, and related usage data will be sent to Apple. If you have Location Services on your Mac turned on, when you make a search query to Safari with Spotlight Suggestions enabled the approximate location of your Mac at that time will be sent to Apple. Location, search queries, and usage information sent to Apple will be used by Apple only to make Spotlight Suggestions more relevant and to improve other Apple products and services.
If you do not want your Safari search queries and Spotlight Suggestions usage data sent to Apple, you can turn off Spotlight Suggestions in Safari. Simply choose Safari > Preferences, click Search, then deselect the checkbox for Spotlight Suggestions.
You can turn off Location Services for Spotlight Suggestions in the Privacy pane of System Preferences on your Mac by clicking Details next to System Services, then deselecting Spotlight Suggestions. If you turn off Location Services on your Mac, your precise location will not be sent to Apple. To deliver relevant search suggestions, Apple may use the IP address of your Internet connection to approximate your location by matching it to a geographic region.
Information collected by Apple will be treated in accordance with Apple’s Privacy Policy, which can be found at www.apple.com/privacy.
Note: Spotlight Suggestions may not be available in all regions.
Turn off Spotlight Suggestions in Safari: Open Safari, choose Safari > Preferences, click Search, then deselect Spotlight Suggestions.
Turn off Location Services for Spotlight Suggestions: Choose Apple menu > System Preferences, click Security & Privacy, then click Privacy. Click the lock icon 
to unlock the pane, then enter an administrator name and password. Click Details next to System Services, then deselect Spotlight Suggestions.