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Spider - a browser-like program that downloads web pages.

Crawler – a program that automatically follows all of the links on each web page.

Indexer - a program that analyzes web pages downloaded by the spider and the crawler.

Database– storage for downloaded and processed pages.

Results engine – extracts search results from the database.

Web server – a server that is responsible for interaction between the user and other search engine components.

Specific implementations of search mechanisms may differ. For example, the Spider+Crawler+Indexer component group might be implemented as a single program that downloads web pages, analyzes them and then uses their links to find new resources. However, the components listed are inherent to all search engines and the seo principles are the same.

Spider. This program downloads web pages just like a web browser. The difference is that a browser displays the information presented on each page (text, graphics, etc.) while a spider does not have any visual components and works directly with the underlying HTML code of the page. You may already know that there is an option in standard web browsers to view source HTML code.

Crawler. This program finds all links on each page. Its task is to determine where the spider should go either by evaluating the links or according to a predefined list of addresses. The crawler follows these links and tries to find documents not already known to the search engine.

Indexer. This component parses each page and analyzes the various elements, such as text, headers, structural or stylistic features, special HTML tags, etc.

Database. This is the storage area for the data that the search engine downloads and analyzes. Sometimes it is called the index of the search engine.

Results Engine. The results engine ranks pages. It determines which pages best match a user’s query and in what order the pages should be listed. This is done according to the ranking algorithms of the search engine. It follows that page rank is a valuable and interesting property and any seo specialist is most interested in it when trying to improve his site search results. In this article, we will discuss the seo factors that influence page rank in some detail.

Web server. The search engine web server usually contains a HTML page with an input field where the user can specify the search query he or she is interested in. The web server is also responsible for displaying search results to the user in the form of an HTML page.

Always tries to make your site simple and sober. Don’t try to overload it with flash, java script, heavy image and videos. Heavy image and videos increases size of the page and if one its over than the prescribed limit by the search engine friendly website, then there will be a problem in website optimization.

On the other hand search engines hates java script so don’t try to write it on the main web page instead it should be write on separate page. Make your webpage light and clean so that crawler or web spider may crawl entire sites easily.

Google and other search engine have their own rule how to provide accurate results for a search. So try to make your title and description of your site meaning full, which best matches the search query.

Google is now giving more importance to Bold text instead of Strong. So make bold your all important keywords in the content instead of strong.

Google and other search engine have their own rule how to provide accurate results for a search. So try to make your title and description of your site meaning full, which best matches the search query

Google doesn’t take any negative action if it found coding errors on it.

Making a long website with millions of web pages in it is not a problem but upload entire website at a time is a problem. It is an obstacle in search engine optimization. So launch you website with gapes. Page should be added after some time intervals not at the same time. It is good as per seo.

If you are promoting dynamic site you should not use more than two or three parameters on url to ensure better crawling and well search engine optimization you. Moreover these should be short.

if you are redirecting your website using “301 Redirect” to a new website, always remember the concept of relevant website. It means always try to redirect to related site. Other wise Google take it as unethical seo tips and tricks.

Don’t try to use clocking concept to drive traffic for your website as Google takes it very serious as it is black hat seo trick or unethical seo techniques.

Most of the seo forget to change css and java scripts element for more than on websites. If you use same css and java scripts code and element for more than one site Google can penalize your site.

Always use prefer domain it means which is better for search engine optimization with www or without www domain. Check it our and optimize accordingly.

Google consider content of your site duplicate if it is exact same with other site other wise not. So you can modify the content and can use it with other purposes.