what is main difference between SEO and SEM?

[noahwilson]

Hello Guys,
I am not more familiar to these services, so please tell me there is any difference between SEM and SEO? please share your reviews.
Thanks.

[webcreations]

Search engine optimisation (SEO) is a process of optimizing a website for getting page rank in (search engines) google, yahoo, altavista, msn, etc.. The goal is to have a page rank as high up on the results list as possible, or be on the first results page, or at the very least on the second results page. Search engine optimization (SEO) includes the choice of keywords used in the text paragraphs and the placement of those words on the page, both visible and hidden inside meta tags.
SEM(Search Engine Marketing) is the term for Internet marketing to advertise or promote Websites by increasing their visibility within search engines. Search Engine Marketing (SEM) uses organic search with Search Engine Optimization (SEO) keywords, Pay-Per-Click (PPC) paid placement ads, and Pay-For-Inclusion (PFI) ads for online directory listings.
Search engine marketingis often used to describe acts associated with researching, submitting and positioning a Web site within search engines to achieve maximum exposure of your Web site. SEM includes things such as search engine optimization, paid listings and other search-engine related services and functions that will increase exposure and traffic to your Web site.

[jamsen]

EO stands for Search Engine Optimization, and it refers to the process of increasing your website’s search engine ranking for a specific keyword or set of keywords. Said another way, search engines look for specific things on and off of your website that determines whether or not it’s relevant for a specific query, and SEO is the goal of doing those things.

Search engine marketing is the strategy to increase your traffic and sales through the search engine channel. Search engine marketing includes the tactic SEO and the tactic Paid Search.

[blessy_smith]

SEO is all about making website more known and reputed as people like to deal which has reputation in market. So this way seo for website and website helps to increase business. We can say that seo is one kind of free source for online marketing of business.
SEM is search engine marketing. It is one kind of paid advertising path for business. It include ppc , cpc , cpt and many other techniques which be helpful for more traffic. It is costly so that small business firm can't afford it.
We can say that SEM is the direct path for our online business where as SEO is the indirect path for our business success.

[Markyarnell08]

SEO is improving your website "search-ability" in SERPs. This can be done by variety of techniques from link building to article publication. SEM is attracting and selling to customers via the execution of SEO methods. See SEM as strategy/tactics while SEO is the execution and the how to do.

[brainpulse]

SEO stand for Search Engine Optimization, It's process of optimizing the website with related search queries over the search engine results page just to get visitors, visitors also convert as a business lead that's the importance of SEO.
SEM stand for Search Engine Marketing, It's process of paid marketing over the search engine with related related search queries, PPC is the one of the example of it.

[gwenherrick]

SEM is a broader term than SEO. Where SEO aims to provide better organic search results, SEM uses the search engines to advertise your website or business to Internet customers and send a more targeted traffic to your Web site.

[honeysign]

SEO is an internet marketing technique in which you can submitted your website to Google page rank site for getting back links and good ranking and organic results in search engine but SMO is social activities for getting quality traffic and more visitors for any website.

[johnmacklen]

SEO is part of SEM....

[steveschmidt85]

SEO is part of SEM....

No, SEM is just one part of SEO. SEO is very bigger than SEM, which includes PPC, SMO.

[sabrinasai]

enerally speaking, SEM (Search Engine Marketing) has come over time to refer to paid advertising, such as pay-per-click ads.

SEO (Search Engine Optimization) refers to helping sites perform better in the organic (free) search listings.

[Rajdeep Bose]

SEO---- SEO is a technique which helps search engines find and rank your site higher than the millions of other sites in response to a search inquiry. It can be done with the help of article submission, bookmarking etc.

SEM-- Search engine marketing (SEM) refers to the short text advertisements which generally appear at the top or down the right hand side of search engine results. These are often labelled as "sponsored Links" or "sponsored results".