The document provides examples and explanations of embedded clauses. It defines embedded clauses as groups of words within a main clause that are usually marked by commas. Embedded clauses provide additional information about the topic of the sentence. They are dependent on the main clause and do not make sense on their own. The document gives examples of different types of embedded clauses including nominal clauses introduced by words like "that" and relative clauses introduced by words like "which." It also contains exercises for identifying and adding embedded clauses to sentences.