The document discusses the use of the modal verb "should" to make recommendations, give advice, express obligations, and expectations. It notes that "should" is commonly used to provide recommendations or advice on actions. Examples are given such as recommending visiting palaces in Berlin or advising focusing more on family than work. The document also indicates that "should" can express obligations like needing to be in the office by 7 AM, as well as expectations like people expected being in Dubai by now. Finally, it states that a chart is provided to illustrate how "should" is used in the present, past and future tenses.