Close attention refers to the level of concentration one employs to absorb and perceive information. When one is attentive, it is easier to understand and retain information. There are many synonymous phrases for close attention, which can be used interchangeably, depending on the context and intention. Some examples of synonymous phrases include "rapt attention," "focused attention," "undivided attention," "serious concentration," "keen observation," "intense focus," and "riveted attention." These words or phrases hold different connotations, depending on the speaker's intention, but they all communicate the desire to be attentive and present in the moment.