The Simple Past is a verb tense that indicates actions completed in the past. It is used to describe actions that have already happened and finished at some point in the past. Some examples of its uses include speaking about completed past actions, past habitual actions, narrating past events over a period of time, and stating past general facts. The simple past is formed by adding "-ed" to regular verbs, or using irregular past forms for verbs like "see/saw". It is equivalent to the preterite or indefinite past tense in Spanish.