FCrowdActivityCognitionTag is a type of
FGameplayTag that only allows tags mapped to the "CrowdActivityCognition" base category.
Tags (or even other categories) mapped to "CrowdActivityCognition" encapsulate anything from knowledge, reasoning, to memory for crowds specifically.
FCrowdActivityCognitionTag just denotes this in a more type-safe way, which is understood by the editor when used as property or function argument.
You can use this structure instead of constantly typing out
UFUNCTION metadata specifiers responsible for filtering your gameplay tag.