What happens is that I wanted to create an anim file so to be able to make animation in my android app and when I saw several tutorials I realized that you need to create a folder of type anim, but when I tried to create it, it did not appear and in its place only appeared something that resembled, that was the folder of type transition, are the same folders.
I am using the latest version of Android Studio (3.0).
The resource folder type transition as its name says it is for transitions between views and such. The folder you type anim is for the animations just like you mention it. They are similar resources, but they are not the same. Both are located in the folder res of your application.
"When I saw several tutorials I realized that you need to create a Anim type folder, but when I tried to create it, it did not appear "
Android studio has a bug in which some resource folders do not appear when they are created, try to refresh your project, or even close it and reopen it.