Search engines are the first things Internet surfers look for when they are searching for goods or services. Where your website appears to the visitors in their search results is of utmost importance. The objective of all Internet marketers is to ensure that their URLs appear right at the top of the first page or at least the first 50th position because visitors would tend to click only on the most prominent URLs.
This boils down to "Search Engine Optimization", commonly referred to as "SEO" and it is also the holy grail of web design. There are many ways to optimize your site so that search engines will list your site higher in their rankings.
First and foremost, it is the "keyword". Keywords are the foundation on which the entire search engine system works. If a top ranking site suddenly drops drastically, it may mean that certain content of the website has become invisible or inaccessible to search engine spiders and crawlers. Very often certain particular keyword or phrase has been ineffective due to fierce competition. For beginners, it is advisable to start with keywords which are not too competitive to at least get some traffic going first.