Introduction to seo
Whenever you enter a query in a search engine and hit 'enter' you get a list of web results that contain that query term. Users normally tend to visit websites that are at the top of this list as they perceive those to be more relevant to the query. If you have ever wondered why some of these websites rank better than the others then you must know that it is because of a powerful web marketing technique called Search Engine Optimization (SEO).
SEO is a technique which helps search engines find and rank your site higher than the millions of other sites in response to a search query. SEO thus helps you get traffic from search engines.
When a search request comes, the search engine processes it – i.e. it compares the search string in the
search request with the indexed pages in the database. Since it is likely that more than one page (practically it is millions of pages) contains the search string, the search engine starts calculating the relevancy of each of the pages in its index with the search string.
There are various algorithms to calculate relevancy. Each of these algorithms has different relative
weights for common factors like keyword density, links, or metatags. That is why different search engines give different search results pages for the same search string. to SEO, if you'd like to be at the top.
The last step in search engines' activity is retrieving the results. Basically, it is nothing more than
simply displaying them in the browser – i.e. the endless pages of search results that are sorted from the most relevant to the least relevant sites.
Whenever you enter a query in a search engine and hit 'enter' you get a list of web results that contain that query term. Users normally tend to visit websites that are at the top of this list as they perceive those to be more relevant to the query. If you have ever wondered why some of these websites rank better than the others then you must know that it is because of a powerful web marketing technique called Search Engine Optimization (SEO).
SEO is a technique which helps search engines find and rank your site higher than the millions of other sites in response to a search query. SEO thus helps you get traffic from search engines.
How Search Engines Work
First, search engines crawl the Web to see what is there. This task is performed by a piece of software, called as crawler or spider . Spiders follow links from one page to another and index everything they find on their way. Having in mind the number of pages on the Web (over 20 billion), it is difficult for a spider to visit a site daily just to see if a new page has appeared or if an existing page has been modified, sometimes crawlers may not end up visiting your site for a month or two.When a search request comes, the search engine processes it – i.e. it compares the search string in the
search request with the indexed pages in the database. Since it is likely that more than one page (practically it is millions of pages) contains the search string, the search engine starts calculating the relevancy of each of the pages in its index with the search string.
There are various algorithms to calculate relevancy. Each of these algorithms has different relative
weights for common factors like keyword density, links, or metatags. That is why different search engines give different search results pages for the same search string. to SEO, if you'd like to be at the top.
The last step in search engines' activity is retrieving the results. Basically, it is nothing more than
simply displaying them in the browser – i.e. the endless pages of search results that are sorted from the most relevant to the least relevant sites.
Search engine optimization (SEO in short) is basically comprised by two fundamental strategies:
1) On site SEO
2) Off site SEO
