Ur a real one if u know this

IM GETTING RIPPED TONIGHT

ay that awesome man

ummm oki

thanks for telling us--

Explanation:

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.

the answer is "the man who came here yesterday was selling magazines."