Reciprocal pronouns are words used to indicate a mutual relationship between two or more subjects or objects. These pronouns are often used when each of the subjects is acting in the same way towards the other, demonstrating reciprocity in their actions. Examples of reciprocal pronouns include "each other" and "one another." They are different from reflexive pronouns in that reciprocal pronouns show mutual actions between multiple parties, while reflexive pronouns reflect the action back to the subject who is performing it. Reciprocal pronouns are essential in indicating mutual actions and relationships in sentences.