Good general starting point for UK surfers. Lots of content, with some restricted to members only. Differs between countries. It offers the options of searching sites it has rated and reviewed, or its entire database. Within the reviewed sites, users can opt to only search for green light sites, which are those determined to have no adult content.
Sites are also browsable by topic and sub-topic.
Site rating system is comprehensive and useful for selecting quality sites. Green light feature is unique among major search engines. Database is far from comprehensive. Browsing by topic can be cumbersome. Northern Light organizes its search results by creating folders of documents with similar subjects, sources, or types.