Ecaml.LoadLoading a file of Lisp code means bringing its contents into the Lisp environment in the form of Lisp objects. Emacs finds and opens the file, reads the text, evaluates each form, and then closes the file.
(Info-goto-node "(elisp)Loading")
(describe-function 'load) (Info-goto-node "(elisp)How Programs Do Loading")
val path : string list Var.t(describe-variable 'load-path) (Info-goto-node "(elisp)Library Search")