Basic Information
Conjuration (from the Latin literally "swearing together") used to refer primarily to the practice of calling up supernatural entities and bargaining with them - the sort of thing more normally classified as summon magic or invocation in the modern era.
These days - and largely due to the connotations of making something appear out of nowhere - conjuration tends to refer to workings that bring physical objects or creatures from one place to another (or create them out of thin air, although this might also be called evocation).
In some systems, this will still be considered an aspect of summon magic or invocation.

