If you become an SEO Expert you will have lots of opportunity in field of Digital Marketing. SEO is one of the most demandable job of 21st century. SEO experts are paid a handsome salary. According to Glassdoor an SEO expert can earn Rs.3 Lakhs to Rs.36 lakhs per annum in India. Even as an SEO Expert in Kolkata you can earn upto 8 lakh per year.