The page after search engine crawled and inverted index calculated by indexing process, the search engine can handle user search.After users fill in keywords in the search box, the index ranking procedure call library data, calculate ranking and displayed to the user, the ranking process is to interact directly with the user.

1. How Search Engines Rank Web Pages Part II
How Search Engines Rank Web Pages Part I
3. Ranking and filter also
Selected files that match a subset,calculate the correlation after, probably the rankings have been
identified.After search engines and possibly some filtering algorithms, minor adjustments to the
rankings, one of the most important filter are punishment.Suspected of cheating the webpages,
although the rights in accordance with normal weight and correlation calculations discharged to
the front, but the search engine penalty algorithm may be the final step to these webpages
transferred back to.
4.Rankings show
After all rankings determine the ranking procedure call to the original page’s title tag, label
snapshot date data are displayed on the page. Sometimes search engines need to be dynamically
generated page summary rather than the page itself is called descriptive label.
5. Location, Location, Location…And Frequency
Location…
One of the main rules in a ranking algorithm involves the location and frequency of keywords on a
web page. Call it the location/frequency method, for short.Remember the librarian mentioned
above? They need to find books to match your request of “travel,” so it makes sense that they first
look at books with travel in the title. Search engines operate the same way. Pages with the search
terms appearing in the HTML title tag are often assumed to be more relevant than others to the
topic.Search engines will also check to see if the search keywords appear near the top of a web
page, such as in the headline or in the first few paragraphs of text. They assume that any page
relevant to the topic will mention those words right from the beginning.Frequency is the other
major factor in how search engines determine relevancy. A search engine will analyze how often
keywords appear in relation to other words in a web page. Those with a higher frequency are often
deemed more relevant than other web pages.
6.Cached Pages
Google takes a snapshot of each page it examines and caches (stores) that version as a back-up.
The cached version is what Google uses to judge if a page is a good match for your query.
Practically every search result includes a Cached link. Clicking on that link takes you to the
Google cached version of that web page, instead of the current version of the page. This is useful
if the original page is unavailable because of:
• Internet congestion
• A down, overloaded, or just slow website
• The owner’s recently removing the page from the Web

2. Sometimes you can access the cached version from a site that otherwise require registration or a
subscription.
Note: Since Google’s servers are typically faster than many web servers, you can often access a
page’s cached version faster than the page itself.
If Google returns a link to a page that appears to have little to do with your query, or if you can’t
find the information you’re seeking on the current version of the page, take a look at the cached
version.
As part of efforts to provide a clean and simple redesign of the search results page, Google moved
cached and similar links within the Instant Previews. Just hover over the search result, then hover
over the arrows that appear to the right of the result. Learn more about the recent changes to the
Instant Preview feature:
Instant Previews refresh blog post:
http://insidesearch.blogspot.com/2011/09/choosing-result-you-want-just-became.html
Let’s search for pages on [ sugar cubes math ].
Click on the Cached link to view Google’s cached version of the page with the query terms
highlighted. The cached version also indicates terms that appear only on links pointing to the page
and not on the page itself.

3. When Google displays the cached page, a header at the top serves as a reminder that what you see
isn’t necessarily the most recent version of the page.
Otras lecturas: http://www.seomoz.org/beginners-guide-to-seo/how-search-engines-operate