The Indicative Mood is a grammatical mood used to make factual statements or ask questions. It expresses actions, events, or conditions that are real or certain. For example, in the sentence "She reads a book," the verb "reads" is in the indicative mood, indicating a straightforward fact. In English, the indicative mood is the most commonly used mood and can be found in various tenses, such as present, past, and future. For instance, "They will go to the park" uses the future tense in the indicative mood to convey a planned action.