This document provides tips on using the prepositions "to", "of", and "for" to improve one's IELTS exam score. It explains that prepositions link words and phrases in sentences. The document then gives examples of proper uses of each preposition, including indicating direction, limits, time periods, reasons, durations, belonging, reference, and amounts. It provides sample sentences to illustrate the different uses of each preposition. Additional online resources are listed for further tips on using prepositions for the IELTS exam.