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Hello Friends - I am just learning Moz tool via Udacity I was doing some analysis using Moz for the following keyword "digital marketing courses" This is the result what I get. Moz tells me the opportunity is 83. This is a high number and does not reflect what I see when I search in google. The page is full of ads. A organic click is going to be very difficult. 
Moz potential also says 79 - again a high number which does not seem to be the reality. It is going to be very difficult for a new service to rank higher. I have fundamental doubt on whether SEO will work on keywords which are in high demand by paid ads. more that 30% of the real estate on screen gets taken by paid ads. Even if one searches for long tail key word the story remains same. Does SEO really have a chance to compete with paid ads for business driving keywords? pub