I apologize in advance if this post is bias towards an opinion as I have not thoroughly analyzed it. I am open to suggestions if something sounds too bias, brash or naive [if it shouldn't be].
I have found this issue arising quite frequently and I don't know if there are currently solutions in helping to reduce it:
A new member joins the Puzzling community (possibly fresh or active from another SE). Then they post their first question or answer and it doesn't have proper spoiler tags or formatting! I have found myself having to explain how to use spoiler tags and some other features multiple times. (I myself initially didn't know until explained to). I have noticed a similar situation in markup questions from the meta post here
Considering that on Puzzling, knowing the basics of using single/multi-line spoiler tags are very frequently used, I feel that making this information more formally introduced or available to (new) members could help in reducing many post edits/explinations. [Similarly to how tags are introduced]
I have looked over the tour page and have been unable to find anything related to this, and it seems that this information could be useful for many other users. (i.e I still don't fully know how to implement math properly and have only used it from other answers)
Are there other methods to learning about this? Do you think this is significant enough to introduce to new/existing users?