Search engine optimisation or SEO has been ruling the roost for a decade now, even though social media and mobile apps have been trying to overthrow its supremacy.Search engine optimisation or SEO has been ruling the roost for a decade now, even though social media and mobile apps have been trying to overthrow its supremacy. For know more explore : www.netvision.com.au/5-simple-questions-to-ask-a-digital-marketing-agency/