I just saw this post:
How do I prevent Tiny Death Star from crashing when trying to collect an imperial items reward?
It doesn't seem like a really important post, why the need to protect it?
I just saw this post:
How do I prevent Tiny Death Star from crashing when trying to collect an imperial items reward?
It doesn't seem like a really important post, why the need to protect it?
Community protects questions that get three deleted posts from new users (9 or less rep). In this case, the question got three "me too!" posts. Two of these were deleted by moderators, the third (apparently) through the review queue.
As I don't haver 10k rep I can't see deleted posts I can't tell for certain, but probably because it got a couple spam/thank you posts.
If my memory server me right I've read somewhere that after three deleted posts, community will automatically protect the question.
15k rep users can also protect a question that gathers spam answers.