Boolean Search Rules (con't.)
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Boolean AND Character
When the Boolean AND operator is employed, Google checks its index of webpages and includes in the results only those documents which satisfy the inclusion of each and every keyword. The can be adjacent to each other or scattered throughout the page. They can be in any order.
Notice that the AND feature limits the amount of the pages retrieved. A search for keyword A would yield X number of relevant webpages, while a search for keyword B would yield Y number of relevant webpages. But the search for A AND B would result in a fewer or equal number of webpages.
This is because there are two Boolean questions being addressed instead of one.
Question one - Is the first keyword present?
Question two - Is the second keyword present?
The restriction of returned documents is caused by answering both of these questions and only retrieving those with a positive response to both. If the first question is answered in the affirmative, it is held pending the response to the second question. If the second question is answered no - the page is discarded. If answer two is yes - the remaining pages are sent to the search engine results page.
Boolean OR Operator
Use of the Boolean OR term will look for documents containing any of the keywords. Again, preference is likely accorded to keywords in urls, titles, headings or with great frequency on the document. Note that the syntax OR must be in upper case letters.
Notice that the OR feature expands the number of pages retrieved. A search for keyword A would yield X number of relevant webpages, while a search for keyword B would yield Y number of relevant webpages. But the search for A OR B would result in a greater or equal number of webpages.
Boolean NOT Operator
Another nice term which helps focus the proper context to the word is the Boolean NOT term. The request is for a keyword, but to exclude any results containing a second keyword. This is referred to as negation. The easiest way to negate a keyword is to place a negative sign (hyphen) directly in front of the negated keyword with no space in between. Make sure to have a space directly in front of the hyphen.
For example, Michigan -football would yield SERPs of information about Michigan, unless the webpages contained the word football. Sorry, Bo !
Boolean discussion continues on the next page.
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