distance education accounting
Indexing is simply the work the Search Engine Robots do to give you information on distance education accounting. How does an indexing robot decide what to index? Well they just send their Bots or Spiders to crawl the web looking for distance education accounting on web sites.
If an indexing robot finds a document that contains distance education accounting, it may decide to parse it, and insert it into its database. How this is done will depend on the robot. Some robots index the HTML Titles that contain distance education accounting and keep them in their database whilst others will look for distance education accounting in the first few paragraphs, or parse the entire HTML and index all words.