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Now first of all, what is an "identification question" or "ID question"? Quite simply, it is any question tagged with a tag of the form identify-this-..., in particular the tags identify-this-movie, identify-this-tv-show, identify-this-actor and identify-this-episode. For assessing those statistics, I'll mostly employ the site's real-time search features as well as queries to the Stack Exchange Data Explorer (SEDE). Note that this could result in slight discrepancies, since the SEDE databases are only updated once a week (a few hours before writing this answer) and don't track everything, like deleted questions or user registration. Also keep in mind that we have a policy for deleting inactive unanswered ID questions which might "prettify" the results a little bit in favour of ID questions.

Let's first take a look at some overall numbers of how many of those we have at all. There are currently 2,490 undeleted ID questions, which is 29.1% of all the 8,570 undeleted questions. But what about deleted questions? Of all 3,004 deleted questions 54.8% are identification questions.

So much to the deleted and undeleted questions. What about the closed questions. We have a specific close-reason for identification questions that lack in detail/effort (or are about music videos or commercials for that matter). For this we can employ the closing statistics available to 10k users, which only go back 90 days at maximum though. From the 739 ID questions asked in the last 90 days 205 (27.7%) were closed for not enough detail (8 of which got edited after closing and 4 reopened after improvement). Furthermore, this specific ID close-reason makes up for 52% of all closed questions in the last 90 days, which is however also roughly the ratio of ID questions received in that period.

Now first of all, what is an "identification question" or "ID question"? Quite simply, it is any question tagged with a tag of the form identify-this-..., in particular the tags identify-this-movie, identify-this-tv-show, identify-this-actor and identify-this-episode. For assessing those statistics, I'll mostly employ the site's real-time search features as well as queries to the Stack Exchange Data Explorer (SEDE). Note that this could result in slight discrepancies, since the SEDE databases are only updated once a week (a few hours before writing this answer) and don't track everything, like deleted questions or user registration. Also keep in mind that we have a policy for deleting inactive unanswered ID questions which might "prettify" the results a little bit in favour of ID questions.

Let's first take a look at some overall numbers of how many of those we have at all. There are currently 2,490 undeleted ID questions, which is 29.1% of all the 8,570 undeleted questions. But what about deleted questions? Of all 3,004 deleted questions 54.8% are identification questions.

So much to the deleted and undeleted questions. What about the closed questions. We have a specific close-reason for identification questions that lack in detail/effort (or are about music videos or commercials for that matter). For this we can employ the closing statistics available to 10k users, which only go back 90 days at maximum though. From the 739 ID questions asked in the last 90 days 205 (27.7%) were closed for not enough detail (8 of which got edited after closing and 4 reopened after improvement). Furthermore, this specific ID close-reason makes up for 52% of all closed questions in the last 90 days, which is however also roughly the ratio of ID questions received in that period.

Now first of all, what is an "identification question" or "ID question"? Quite simply, it is any question tagged with a tag of the form identify-this-..., in particular the tags identify-this-movie, identify-this-tv-show, identify-this-actor and identify-this-episode. For assessing those statistics, I'll mostly employ the site's real-time search features as well as queries to the Stack Exchange Data Explorer (SEDE). Note that this could result in slight discrepancies, since the SEDE databases are only updated once a week (a few hours before writing this answer) and don't track everything, like deleted questions or user registration. Also keep in mind that we have a policy for deleting inactive unanswered ID questions which might "prettify" the results a little bit in favour of ID questions.

Now first of all, what is an "identification question" or "ID question"? Quite simply, it is any question tagged with a tag of the form identify-this-..., in particular the tags identify-this-movie, identify-this-tv-show, identify-this-actor and identify-this-episode. For assessing those statistics, I'll mostly employ the site's real-time search features as well as queries to the Stack Exchange Data Explorer (SEDE). Note that this could result in slight discrepancies, since the SEDE databases are only updated once a week (a few hours before writing this answer) and don't track everything, like deleted questions or user registration. Also keep in mind that we have a policy for deleting inactive unanswered ID questions which might "prettify" the results a little bit in favour of ID questions.