what is search engine marketing (SEM) ?

SEM refers to search engine marketing. It consists of strategies that help websites rank high on the major search engines, particularly Google. SEO and PPC are examples of SEM strategies.
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Web crawler Marketing (SEM) is a methodology by which various routines are used to enhance market perceivability and introduction for a brand, item or administration.

SEM systems incorporate Search Engine Optimization (SEO), long range interpersonal communication, offer situation, pay-every snap (PPC), logical publicizing, paid incorporation, geomapping, AdSense and AdWords, and various media organizations, for example, YouTube and geospecific promoting, similar to Foursquare.

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