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