Search Engine Directory

A search engine directory is a (typically human compiled) structured organization of websites and web pages arranged in a categorical database that is available for browsing by navigation the hierarchy of sub categories and topics.

Search Engine Index

A search engine index is a comprehensive database of websites and web pages created by automated robots or spiders (computers written to automatically surf the Internet). Once the robots or spiders have browsed your website they use specially written algorithms to rank pages based on what they believe is the most relevant information for a specific topic