Surprise!
It’s both!
Whether you use a verbs marker or a clicker, the only thing that matters is timing, reinforcement, and consistency!
Choose your marker on what’s most convenient for you.
NOTE: for some dogs, the sound of a clicker may be aversive and a verbal marker would probably be best. Also, with verbal markers, avoid using common words that are used often like “good”. Instead use words like “Yes” and “Nice”.
Which do you prefer to use, a clicker or a verbal marker?