사출해석: What No One Is Talking About
https://www.evernote.com/shard/s649/sh/c131fa7d-071c-49af-af1a-7e99b16218ce/53061f4563c7071a4bc2a60d4e625bc0
But it is crucial to notice that there's also this kind of matter as more than optimizing your articles for certain text, this is called key word stuffing.