It is used to emphasize the noun or pronoun it refers to.
Explanation:
Intensive pronouns are used to add emphasis to the subject or antecedent of the sentence. You'll usually find the intensive pronoun right after the noun or pronoun it's modifying, but not necessarily. The intensive/reflexive pronouns include myself, yourself, himself, herself, itself, ourselves, yourselves, themselves.
Reasoning: A signal word is a word or phrase that gives an idea about what we might expect to come next. This does show that there is a cause and effect relationship between words.
