I t may become possible that the understanding of the information can be instantaneous with much experience, or if the astral travel experience was uniquely strong or unusual. If the mind is accepting of the situation, it is able to visualize and experience the data. If travel was unexpected, or you were unprepared for it the mind may simply ignore the experience or may create some story to try to understand it, which may be a complete fabrication. In other words, you travel and create visualization, which is useful.
Your dreams will broaden as your astral travel experience increases. New insights and wisdom and understanding of past and future will increase through your dreams. The mental mind accepts information; especially details better in this fashion.