What statement describes the difference between blocklists and sensitive categories in Display & Video 360?
Applying a blocklist limits the number of available impressions, but applying sensitive categories doesn't cause any limitations.
Applying sensitive categories limits the number of available impressions, but applying a blocklist doesn't cause any limitations.
You can modify sensitive categories, but you can't modify a blocklist.
You can modify a blocklist, but you can't modify sensitive categories.
Explanation
Analysis of Correct Answer(s)
The fundamental difference between blocklists and sensitive categories is the level of advertiser control and customization.
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A blocklist is a custom list of specific URLs or apps that an advertiser creates and manages. Because it is user-generated, it is fully modifiable. You can add or remove placements at any time to tailor your brand safety strategy.
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Sensitive categories are pre-defined content classifications managed by Google (e.g., "Tragedy & Conflict," "Suggestive Content"). Advertisers can choose to exclude these broad categories, but they cannot modify the underlying list of sites and apps that Google has placed within each category. This list is maintained system-wide by Google.
Therefore, you can edit your own blocklists, but you cannot edit Google's system-defined sensitive categories.
Analysis of Incorrect Options
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The options suggesting one method limits impressions while the other does not are incorrect. Both applying a blocklist and excluding sensitive categories restrict the inventory your ads can serve on. Any form of exclusion targeting will reduce your potential reach and limit available impressions.
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The option stating you can modify sensitive categories but not a blocklist is factually reversed. The primary advantage of a blocklist is its direct modifiability by the advertiser.