Keyword targeting in Google Display Network has a new option “Content” (previously known as Display Select Keywords – DSK). Google Adwords description of this targeting below:
Select this setting to only show your ads on content (such as webpages, apps, and videos) that’s contextually relevant to your keywords. Content keywords were previously known as Display Select keywords (DSK).
This option may significantly narrow the reach of your ads. The “Content” setting only provides about 30% of the reach of the “Audience” setting, on average.
DSK was previously available only in a Beta access.