what are linking verb? answer me please

Linking verbs , implies a state of being or condition for the subject, not an action. It links the subject to an equivalent word in the sentence.It may connect the subject with the noun. It is a verb that is used to connect a subject with an adjective or noun that describes or identifies the subject. The most common linking verb is be. Other common linking verbs are appear, become, feel, go, grow, look, remain, seem, smell sound, taste and turn .