May: Modals of Possibility

A modal verb is a type of auxiliary (helping) verb  that has no meaning on its own but it modifies the main verb, changes  its meaning and gives more details about the action. May  is a type of auxiliary modal verb used to express the possibility  for something to happen and also to ask for or give permission. https://open.books4languages.com/english-a2-grammar/chapter/may-modals-of-possibility/