Per T156832: [RfC] Decide whether to index not-notable placeholders placeholders that are not-notable, but are covered by ArticlePlaceholderSearchEngineIndexed should have meta robots tag with noindex, follow.
|Resolved||Lydia_Pintscher||T150178 Wikidata 2017 Q2 goals|
|Resolved||hoo||T162244 [Story] Search index 10,000 article placeholders on cywiki for testing and evaluation purposes|
|Open||None||T162124 Not-notable placeholders should not be indexable by search engines|
It seems you mean something else, but the main case of "non-notable placeholders" I currently see is covered by T158507: Consider translations and tweak the "notability" requirement for placeholders to be indexable (placeholders with mostly-untranslated content).