The document discusses the difference between the present perfect simple (PPS) and present perfect continuous (PPC) tenses in English. It provides examples of sentences using each tense to illustrate when to use them. The PPS is used for finished actions, long-term actions, and repetitions of an action. The PPC is used for unfinished actions, temporary actions, and to indicate the duration of an action. Key differences are that the PPS indicates a simple completed action while the PPC emphasizes the continuing nature of an action that began in the past.