SEO i.e. search engine optimization is a way through which your website can get more traffic and target visitors toward it. It is not simple to make your website search engine optimized but the basic meaning of SEO is that, if you optimize your site, it will definitely get the higher ranking in the search engine which will in turn bring more traffic to your site.

SEO has now become a highly refined art.  It involves using of key words that the search engine crawlers will read.  These keywords are relevant to your business and the products you sell.  These key words are then indexed by the search engines and when a person searching for something in your niche types the keyword in the search box, your site comes up as a relevant site in that area.

How high your site is in the search engine ranking depends on how well you have optimized your site by using the relevant key words. So this all depends on the relevance of your keyword and how often a visitor uses it in his search of your niche.  If you are selling guitars, your key words have to be guitar, chords, music, acoustic guitar, electric guitar, guitar strings and so on.  It definitely will not help your site if you used any unrelated key word like piano chords.  They also pertain to music but do not have any relevance to your niche.

Remember that your key word has to be relevant for SEO optimization of your website. People who are searching for products related to your keyword are already ready to buy and once they visit your website, they may just like the product you are selling and purchase it.

However, that being said, you may optimize your website using SEO but there is such a thing as overdoing it.  Stuffing your website with key words will make your content clunky and prove counterproductive.  The search engine crawlers may just ignore your website.

Using of SEO can take 30 minutes or it can become permanent task for you. If you are efficient or master of perfect keywords then routine SEO is enough to get your website higher in ranking in search engine. But if you are not efficient or adept at the art, then you have to give time and effort to SEO in order to get your site optimized. If you find it difficult, hire an expert to optimize your website for you.

Search engine differ from humans. Search engines can’t feel design of site or listening of sounds in the site. They simply crawl from web page to web page and ‘read” a particular text in order to get idea of the site.

The functions performed by search engines are indexing, crawling, calculating, processing, retrieving and relevancy.
First the search engine sends a spider or a bot, which crawls and reads the content, storing the keywords for indexing.  It also checks out all the links.  This is a fully automated process which happens perhaps once a month or may be more. This information is then indexed for use of searchers. Once a person types the keyword, the search engine lists the page as per how it feels it is relevant to the keyword or phrase being searched.