How Search works ?

The first thing to understand is, when you perform a Google search, you aren’t actually searching the web, you’re searching Google’s index of the web, or at least as much of it as we can find. Google does this with software programs called spiders. Spiders start by fetching a few web pages, then they follow the links on those pages and fetch the pages they point to; and follow all the links on those
pages, and fetch the pages they link to, and so on, until we’ve indexed a pretty big chunk of the web.

Here are some Operators that’ll help you optimize your search results:

1. Chevron (>>) : Clicking on that chevron allows you to preview a document, letting you determine what kind of document is behind the link. It can help you decide whether that link will meet your needs, and whether you want to visit the page.

2. site : It limits the results within a specified site range.

Effective :
1. [site:stanford.edu]
2. [site:com]
3. [site:.com]
4. [site:nih.gov baby safe sunscreen]

Ineffective :
1. [site: stanford.edu]
2. [site:stanfordedu]
3. [site:stanford]

3. filetype : This is the way of limiting your results to files and documents of a particular kind.

Effective :
1. [filetype:swf muscle contraction]
2. [muscle contraction filetype:swf]
3. [filetype:swf]

Ineffective :
1. [filetype: csv]
2. [filetype:.swf]

4. Minus operator (-) : It simply removes the invasive results.

Effective :
1. [salsa -dancing]

Ineffective :
1. [salsa – dancing]
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