Confused by Coq imports

Question

Can someone please tell me the differences between

• Require Name.
• Require Import Name.
• Impor

Answer 1

• Require: load an external library (typically from the standard library or the user-contribs/ folder);
• Import: imports the names in a module. For example, if you have a function f in a module M, by doing Import M., you will only need to type f instead of M.f;
• Require Import: does both Require and Import.