Christy Gavin Spring, 2009 The Google Search Engine.
Post on 22-Dec-2015
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Google Fast Facts
•Invented by Larry Page and Sergey Brin
•Online 1998
•Named after “googol”
•Verb in the OED, 2006
•Added the one trillionth web address, July 2008
•500 million searchers a year
How GoogleBot finds your website:
• You submit URL to Google
• You submit a sitemap to Google
• GoogleBot finds a link to your site
Google’s “keyword-targeted text ads.”
You do not see the ad unless your search relates to the ad’s topic.
PageRank works like a voting system.
Page A links to page Z. This is a vote for page Z.
The more pages that link to a page. . .
that page receives a high PageRank.
Google also looks at the page that casts the vote.
If page A has received lots of votes, A will increase the importance of page Z.
So to be included in Google’s top ranked results a page:
• must have lots of votes, and must have
• votes cast by pages that have received many votes of their own.
Other ways Google ranks relevance
•Density = frequency
•Proximity = closeness of keywords
•Prominence = titles, links, tags
Google’s recipe for retrieving relevant results is based on a combination of:
•PageRank
•Density of keywords
•Proximity of keywords
•Prominence of keywords
Google’s top results do not indicateThat these are the he top results with the quality of the website.
1. Enter your topic in Google and Yahoo.
2. Compare the top 5 results in each search engine.
3. Do both search engines retrieve the same websites?
4. Do both search engines provide targeted ads?
Byron Hurt takes pains to say that he is a fan of rap, but over time, says Mr. Hurt, a 36-year-old filmmaker, ''I began to become very conflicted about the music I love.'' A new documentary by Mr. Hurt, '‘Rap: Beyond Beats and Rhymes,'' questions the violence of women in much of rap music.
Excerpt from the New York Times
Identify the 3 most important keywords (concepts).
distinct individual: “ kanye west”
organization: “american medical society”
company “general motors”
quote: “to be or not to be”
Use the double quote:________________________________
We model friendship formation as a selection process constrained by individuals' ability to make friends. Blacks are generally the most cohesive racial category, although when whites are in the minority, they display stronger selective mixing than do blacks when blacks are in the minority.
Keyword phrase:
The way to the school is hard when walking in the rain.
Stored keyword phrase:
* way * * school is hard when walking * * rain.
To include stop words in your search you can either use:
1. double quotes:
“The way to the school is long and hard when walking in the rain.”
2. + before each stop word:
+the +who
distinct individual: “ kanye west”
organization: “american medical society”
company “general motors”
quote: “to be or not to be”
Use the double quote:________________________________
We model friendship formation as a selection process constrained by individuals' ability to make friends. Blacks are generally the most cohesive racial category, although when whites are in the minority, they display stronger selective mixing than do blacks when blacks are in the minority.
Keyword phrase:
The way to the school is hard when walking in the rain.
Stored keyword phrase:
* way * * school is hard when walking * * rain.
To include stop words in your search you can either use:
1. double quotes:
“The way to the school is long and hard when walking in the rain.”
2. + before each stop word:
+the +who
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