Defination Of SEM : In Internet marketing,
search engine marketing, or
SEM, is a set of marketing methods to
increase the visibility of a website in search engine results pages (SERPs). In Internet marketing,
search engine marketing, or
SEM, is a set of marketing methods to increase the visibility of a website in search engine results pages (SERPs).
The three main methods of SEM are:
<1> Search engine
optimization : Search engine optimization or SEO aims to index and improve rankings for the webpages which are most relevant to the keywords searched for according to the algorithm of each search engine. The relevant pages are returned in search engine results pages (SERPS). It is important to remember that genuine search engine optimizers are basically marketers who keep their target market in mind as much as the search engine algorithms (a lot of which is known purely empirically). Therefore, while we call this process search engine optimization, good marketers will note that their focus is to optimize their web page for the search engine user, who is their target audience. For instance, at one time it was believed that keyword density was an important ranking factor, but today that view is not generally held among SEO professionals. Today, many SEOs recommend writing copy for visitors first, because the web site cannot achieve its marketing objectives with "unnatural" sounding text, laden with keywords.
<2>Pay per click (PPC) : and Search engine
advertising Advertising with search engines is known by different names. It is also called sponsored search and search engine advertising. The most popular programs are offered by Google, Yahoo!, and Microsoft. Some offer PPC, where the advertiser is only charged when a user clicks on the ad, also known as Cost Per Click (CPC). Others use a Cost Per Impression (CPM) model where advertisers are charged for impressions. Ads can take many forms, including text, banner ads, video ads, map ads, and even audio ads.
<3>Paid inclusion : Search engines use computer programs called spiders or web crawlers to automatically discover websites and catalog their content. As this process can take some time and requires a website to be linked to from another website (to allow the crawler to find it), most search engines except for Google provide another channel to be included in search rankings via paying. This is different from pay per click advertising because the inclusion is guaranteed but not placement.