The difference between SEO and SEM is that SEO methodologies are purely based on Organic search. Whereas SEM includes both Paid and Organic search. Business professionals who would like to invest on a Long-lasting Business, then SEO  is our suggestion. The only disadvantage of the paid advertisement is that the traffic disappears once if you cancel your payment. Organic search is always. If you need more updates and would like to know more about our Digital Marketing Company in Chennai, contact our support team.