Postpositions are used to identify the location of something in relation to something else, whether physically or conceptually.
As indicated by the name, postpositions come after something else, which is usually a noun that the postposition is connected to. When connected the noun or object becomes genitive. Listed below are some of the more common postpositons in a few different categories. A full list of postpositions can be found from Wiktionary and Uusikielemme.
Concrete postpositions identify where something physically exists in relation to something else. This connects things to objects that are in generally stable or unmoving locations.
Movement expressing postpositions
Movement expressing postpositions identify where something physically exists in relation to something else which is often in motion or implying movement.
Abstract postpositions identify where something is but in less concrete or movement implying ways.
Postpositions of time
Like many postpositions time can be also something to be in, around, ahead of, behind, between and so forth.
Concrete and time related postpositions can often have inflections while other postpositions usually do not inflect.