What's the difference between SEO and SEM?

SEO in free technique for website promotion while SEM is paid marketing technique.

We use SEO for website's submission & SEM for website's brand popularity.

SEO is for optimizing websites for search engine. SEM it is a paid marketing

Thank for the Nice information..

“SEM is the process of gaining traffic by purchasing ads on search engines. It is also called paid search and sometimes referred to as CPC (cost-per-click) or PPC (pay-per-click) marketing, because most search ads are sold on a CPC / PPC basis.”

“SEO is the process of improving the visibility of a website or a web page in a search engine’s “natural” or unpaid (“organic”) search results”.

Seo is the part of SEM, as SEO only targets organic results while SEM cosists all the promotional activities of Online Marketing

SEO (search engine optimization) and the different tactics to help your website rank well in organic search engine results. Another important tactic for Internet business is SEM (search engine marketing) which includes things such as search engine optimization, paid listings and other search-engine related services.

SEO and SEM both are related to Search engine optimization.

SEO is a part of SEM i.e. internet seo.! SEO deal with organic(free searches only) whereas SEM includes every type of internet seo startegy. :)

SEO is only a part of SEM. When paid promotion added along with SEO then it is called "SEM".

Search engine optimization (SEO) can be described as strategies and tactics used to ensure that a site is accessible to a search engine and improves the chances that the site will be found by the search engine. The goal of successful SEO is to obtain a high-ranking placement in the search results page of a search engine (e.g. Google, Bing, Yahoo and other search engines).

SEM is a broader term than SEO, and is used to encompass different options available to use a search engine’s technology,

SEO ia part of SEM.. SEO is a technique used to visible any website in top of the SERPs..

SEO deals with Organic Searches(Free) and we have no charge for it while in SEM we have to charge for click on our ads from every type of searches.

SEO is the process of effecting the visibilty of website and SEM is the process of marketing on search engine.......................

SEO is a part of SEM i.e. search engine marketing.! SEO deal with organic(free searches only) whereas SEM includes every type of search engine marketing startegy.

Thank for the information i did not know that...

Search engine optimization (SEO) is the process of affecting the visibility of a website or a web page in a search engine's "natural" or un-paid ("organic") search results.[jargon] In general, the earlier (or higher ranked on the search results page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine's users. SEO may target different kinds of search, including image search, local search, video search, academic search,[1] news

SEO stands for “search engine optimization.” It is the process of getting traffic from the “free,” “organic,” “editorial” or “natural” listings on search engines. & SEM stands for “search engine marketing.” It is the process of gaining traffic from or visibility on search engines. The phrase is also sometimes shortened to “search marketing.”

In SEO (Search Engine Optimization) we have not to pay for promotion our website among the different type of search engine but in SEM (Search Engine Marketing) we have to pay for that. SEO is basically focused on keyword ranking and traffic but SEM focused to generate revenue and traffic.