This is a template used for notes, it's used together with ref.
Example
Input
This is foobar.{{ref|foobar}} Another note.{{ref|another_note}}
* {{note|foobar}} Foobar is a word
* {{note|another_note}} Yes, another note
Output
This is foobar.[1] Another note.[2]
- ↑ Foobar is a word
- ↑ Yes, another note