Search Engine Optimisation is the process of choosing the most appropriate targeted keyword phrases related to your site and ensuring that this ranks your site highly in the search engine directories
So that when someone searches for specific phrases it returns your site on top of the search results page (SERP).
It basically involves fine tuning the content of your site along with the HTML and Meta tags and also involves appropriate link building process.
The most popular search engines are Google, Yahoo, MSN Search, AOL and Ask Jeeves. Search engines keep their methods and ranking algorithms secret, to get credit for finding the most valuable search-results and to deter spam pages from clogging those results.
A search engine may use hundreds of factors while ranking the listings where the factors themselves and the weight each carries may change continually.
Algorithms can differ so widely that a web page that ranks #1 in a particular search engine could rank #200 in another search engine. New sites need not be "submitted" to search engines to be listed. A simple link from a well established site will get the search engines to visit the new site and begin to spider its contents.
It can take a few days to even weeks from the referring of a link from such an established site for all the main search engine spiders to commence visiting and indexing the new site.
Because search algorithms constantly change or in continual flux, it is advisable to seek the assistance of a professional SEO company, such as We Seo. As with typical adversing such as the Yellow Pages, the SEO campaign is a ongoing investment in your company.
Because search algorithms do change it is required to maintain the optimisation process, to enable high ranking key phrases to stay that way. The campaign can be lowered in to a maintenance mode as it were but continual maintenance is often required to keep a site at the top of it's market.