How to use footnotes
Endnotes and footnotes are the two main ways of referring to the chosen text, or the chance to provide an explanation of a certain concept once the writer considers it essential. Many students face a issue of using endnotes vs footnotes and do not understand when to use each type of speaking. However, in reality, everything is quite simple.
As for the gap between them, then it's in their location on the page. As it comes from the name, endnotes are used at the conclusion of the document, whereas footnotes, on the opposite, should be set in the beginning.
The simplest advice that may be given in this situation is to comply with an academic style you are following. However, these rules aren't strict and you will freely use both of the talking manners writing in one or more one of these styles.