The word "so" is a versatile conjunction and adverb in the English language. As a conjunction, it connects clauses, indicating a result or consequence, such as in the sentence, "It was raining, so we stayed indoors." As an adverb, it can intensify an adjective or adverb, as in "She is so talented." In addition to its grammatical uses, "so" can also express agreement or confirmation in conversation. For example, when someone says, "I think it's going to be a great day," a response could be, "So do I." This usage helps to affirm shared sentiments or ideas.