SEO vs SEM - Explained In Plain English

SEO & SEM - Both are used to increase visibility on search engines like Google and serve the same objective. Then,  What is the difference,  Which one should your business use and  What the cost implications of each ? Lets answer these questions in this episode of Digital Marketing in Plain English with me (Kabir), founder of a digital marketing agency 'A Billion People' with over 20 years of experience and Raghav Gupta, a student and budding influencer running his channel 'Garage Reviews' on YouTube for over 3 years.