Differentiate between SEO and SEM ?

Hello friends,


I want to know that What is the Differentiate between SEO and SEM ? tell me ..

The difference between SEO and SEM is simply that Search Engine Optimization is part of Search engine marketing or Search marketing as it is widely known. Both processes aim in increasing visibility in search engines. SEO is about optimizing the web property to get better rankings in the search results while SEM goes beyond SEO. It involves other methods as well which can get you more search engine visitors like PPC advertising.

SEO:
SEO is the process of optimizing your web site for the purpose of getting free traffic from search engines.
SEM:
SEM is the marketing process with a goal of getting more visibility in search engines either by getting more free traffic (SEO) or paid traffic (Paid search advertising).