This is a top based on the search and trending popularity of the dramas in Korea [on Naver & Daum] and not based on TV ratings ... that is why dramas that didn't start airing yet [like 'The K2'] get to be on the top ... cuz are popular in searches and are already trending ... their popularity is growing even before the first broadcast [cuz of cast, posters, teasers, interviews and other promotion methods] ...
And yes i'm amazed myself that Moon Lovers has such a small rating on TV ... yet on the Korean Web is one of the most popular ... from it's first airing ... every day of the week it was on top 3 popular dramas ...
So it's Top 20 Most Popular in searches [trending] Korean Dramas on the Korean Web ...
