Search Engine Optimization refers to the collection of techniques and
practices that allow a site to get more traffic from search engines
(Google, Yahoo, Microsoft). SEO can be divided into two main areas:
off-page SEO (work that takes place separate from the website) and
on-page SEO (website changes to make your website rank better). This
tutorial will cover both areas in detail! Remember, a website is not
fully optimized for search engines unless it employs both on and
off-page SEO.
How Search Engine Works ?
Search engines perform several activities in order to deliver search results
- Crawling - is the process of fetching all the web pages linked to a web site. This task is performed by a software, called a crawler or a spider (or Googlebot, as is the case with Google).
- Indexing - is the process of creating index for all the
fetched web pages and keeping them into a giant database from where it
can later be retrieved. Essentially, the process of indexing is
identifying the words and expressions that best describe the page and
assigning the page to particular keywords.
- Processing - 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.
- Calculating Relevancy - Since it is likely that more than
one pages contains the search string, so the search engine starts
calculating the relevancy of each of the pages in its index to the
search string.
- Retrieving Results - The last step in search engines'
activities is retrieving the best matched results. Basically, it is
nothing more than simply displaying them in the browser.
