The second section in Safari’s Search preferences, labeled Smart Search Field, provides the ability to specify exactly what data components the browser utilizes when making suggestions as you type. The first, labeled Search engine, allows you to specify which engine Safari utilizes whenever keywords are submitted via the Smart Search field.
Safari’s Search preferences contain two sections.
As you type, Safari will dynamically display suggestions based on your entry each derived from a number of sources including your browsing and search history, favorite websites as well as Apple’s Spotlight feature. When you use Private Browsing windows, Safari doesn’t save your browsing history, and it asks websites you visit not to track you. Apple’s Safari browser features a slimmed-down interface when compared to earlier versions of the application.