2. What is the deep web?
Dynamic content (usually stored in protected databases,
changes frequently)
Dynamic (session-based) or deep urls
Files other than simple text-based formats (pictures,
videos, software, PDFs)
Content behind a paywall (subscription services like The
New York Times or Wall Street Journal)
Raw data (also stored in databases, requires a special
“language” to query, like SQL)
Social content (blog posts/comments,
twitter/facebook/google+ updates, RSS feeds)
3. Deep web search tips:
Vertical searching: there are search engines built
specifically to index certain kinds of information
Split level searching: you can do a general search to
find the right search engine for a topic or kind of data
Add the keywords database, directory or search to your
query
Instead of searching for animal, search for animal
database, animal directory or animal search