The document discusses prepositions of place and how they are used to describe the location or position of nouns by being placed before the noun. It provides examples of common prepositions of place like across, behind, in front of, near, and between and gives sample sentences showing how they are used to describe where a ball is in relation to a tree or trees. It also provides questions asking where common places like a house, canteen, library, and computer lab are along with a sample dialogue showing how to ask and answer questions about location using prepositions of place.