Korean drama headlines often say an episode “recorded 10 percent.” That does not mean 10 percent of every person in Korea watched it, and it cannot be compared directly with a Netflix Top 10 rank.
Household and individual ratings
A household rating estimates the share of measured television households watching a program. An individual rating estimates people rather than households. Nielsen Korea publishes these as separate figures, so the label must travel with the number.
Nationwide and metropolitan figures
Reports may quote a nationwide result or a result for the Seoul metropolitan area. The two samples are different and usually produce different percentages. A headline that chooses the higher number without naming the region removes important context.
Television and streaming are not the same
Linear television ratings measure scheduled viewing through a panel-based system. Streaming services may publish hours viewed, views, rank or days in a chart. Those metrics use different populations and methods. A cable drama’s 5 percent rating and a Netflix No. 1 label do not tell us which title had more total viewers.
A reliable way to report a record
Include the episode date, platform or channel, measurement provider, population and region. For example: “The episode recorded a nationwide household rating of X percent, according to Nielsen Korea.” Then compare it only with figures measured on the same basis.
Ratings are useful evidence of audience behavior, but they are not a score for artistic quality or a complete measure of global popularity.