How Do Search Engines Work

Crawling The Web – How Do Search Engines Work

And Search Engines

It is the search engines that finally bring your to the notice of the prospective customers.  Hence it is better to know how these search engines actually work and how they present information to the customer initiating a search.

There are basically two types of search engines. The first is by robots called crawlers or spiders.

Search Engines use spiders to index websites.  When you submit your pages to a search engine by completing their required submission page, the search engine spider will index your entire site.  A ‘spider’ is an automated program that is run by the search engine system.  The Spider visits a web site, analyzes the content and the site’s Meta tags, and also follows the links that the site connects to.

The spider then returns all that information back to a central depository, where the data is indexed.  It will visit each link you have on your and index those sites as well.  Some spiders will only index a certain number of pages on your new site at first, so don’t quickly create a site with 500 pages!

Once the search engines find these pages, they decipher the code from them and store selected pieces in massive databases, to be recalled later when needed for a search query.

To accomplish the monumental task of holding billions of pages that can be accessed in a fraction of a second, the search engine companies have constructed data-centers all over the world.

The spider will periodically return to the sites to check for any information that has changed.  The frequency with which this happens is determined by the moderators of the search engine.

A spider is almost like a book where it contains the table of contents, the actual content and the links and references for all the websites it finds during its search, and it may index up to a million pages a day.

When you ask a search engine to locate information, it is actually searching through the index which it has created and not actually searching the Web.  Different search engines produce different rankings because not every search engine uses the same algorithm to search through the indices.

One of the things that a search engine algorithm scans for is the frequency and location of keywords on a web page, but it can also detect artificial keyword stuffing or spam-dexing.

Then the algorithms analyze the way that pages link to other pages in the Web.  By checking how pages link to each other, an engine can both determine what a page is about, if the keywords of the linked pages are similar to the keywords on the original page.

How Google and Search Engines Work

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Optimization For Search Engines

is a process of choosing the most appropriate targeted keyword phrases related to your site and ensuring that this ranks your site highly in search engines so that when someone searches for specific phrases it returns your site on tops.

It basically involves fine tuning the content of your site along with the HTML and Meta tags and also involves appropriate link building process.  The most popular search engines are Google, Yahoo, MSN Search, AOL and Ask Jeeves.

Search engines keep their methods and ranking algorithms secret, to get credit for finding the most valuable search-results and to deter spam pages from clogging those results.  A search engine may use hundreds of factors while ranking the listings where the factors themselves and the weight each carries may change continually.

Algorithms can differ so widely that a webpage that ranks #1 in a particular search engine could rank #200 in another search engine.  New sites need not be “submitted” to search engines to be listed.

A simple link from a well established site will get the search engines to visit the new site and begin to spider its contents.  It can take a few days to even weeks from the referring of a link from such an established site for all the main search engine spiders to commence visiting and indexing the new site.

Search engines typically assume that the more popular a site, page, or document, the more valuable the information it contains must be. This assumption has proven fairly successful in terms of user satisfaction with search results.

Today, search engines will index hundreds of millions of pages, and respond to tens of millions of queries per day

If you are unable to research and choose keywords and work on your own search engine ranking, you may want to hire someone to work with you on these issues.

Search engine marketing and promotion companies, will look at the plan for your site and make recommendations to increase your search engine ranking and website traffic.

If you wish, they will also provide ongoing consultation and reporting to monitor your website and make recommendations for editing and improvements to keep your site traffic flow and your search engine ranking high.

Normally your experts work with your web designer to build an integrated plan right away so that all aspects of design are considered at the same time.

One of the areas of search engine research is concept-based searching. Some of this research that search engines involves using statistical analysis on pages containing the words or phrases you search for, in order to find other pages you might be interested in.

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