When you begin entering text in the URL input field suggestions appear below the address. Each address suggestion displays one of the following icons:
The Search icon appears next to searches.
The Bookmark icon appears next to bookmarked sites.
The History icon appears next to sites from your browsing history.
The Globe icon appears next to related sites.
You can set the default search engine for the address bar by tapping the Menu icon (at the upper-right corner of the screen) > Settings > Search engine.