what does a small つ indicate in kana?
What does the little ”つ” mean in words like this　四つ　( よ”つ”つ) ?

Question

Answer

It represents a double consonant, like tt or pp, etc.

四つ is よっつ　(Yottsu)

ex
かった (katta)
あっか (akka)
はっは゜(happa)

Answer

Well it's used when you want to do a double letter, like よっつ　(yottsu) :) hope i helped

Answer

do you mean this https://www.youtube.com/watch?v=wAHhZK91Gdk ?