The noun phrase "a series of online tutorials" is the direct object of the sentence. The direct object is a word, phrase or clause that is the recipient of the action of a verb. A simple way to find the direct object is to ask <em>what?</em> to the verb. For example: <em>Mara, a professional makeup artist, created what?</em> - <em>She created </em><em>a series of online tutorials</em>.
Only action verbs or <u>transitive verbs</u> can have direct objects. We must be careful not to confuse transitive verbs with linking verbs, since the last group would answer the question <em>what?</em> or <em>who?</em> with a subject complement.
