Actually many internet users are confused in knowing about Search Engine Optimization (SEO) and Search Engine Marketing (SEM).

Search engine optimization (SEO) is the process of improving quality of traffic and volume to a web site from search engines via natural search results. SEO is a way of optimizing the website with the use of meta tags, title tag and contents of the website to get good listing on organic search engine results, in major search engines like Google, Yahoo!, or MSN.

search engine uses a system called 'Spider' to crawl our information from the website and to determines the relevancy of our website content with the keyword search. There are many factors, such as content, number of back links to your site and your meta tags, these factors will decides how your website will be ranked. However, there is a no guarantee of getting top position in search engine results, because it takes some time and effort to make the linking and content is suitable. This will usually takes months to be effective, by this you will came to know how the search engine determines their organic result ranking.

Search engine marketing (SEM) is a form of Internet marketing and advertising that really promote websites by increasing their visibility in search engine result pages (SERPs). According to the Search Engine Marketing SEM methods include: search engine optimization (or SEO), contextual advertising, paid placement, and paid inclusion.

It is one kind of paid advertising which can makes you gurantee in getting prominent rank on the search engine results. Here you can choose the own keywords to get listed on. There is no limitation in selecting the keywords as long as the keywords are approved by the various search engine editors. SEM not only includes search but also it helps in advertising banner. This banner advertising is the great way to create online awareness.When we compare with SEO and SEM both will serve the same purpose, Because both working for you to achieve maximum results. SEO shows you how relevant you can be on organic listing while SEM makes you to be listed in top position always.