Talk the talk.
Talk the talk.
Talk the talk" implies someone who speaks in a convincing way, often about skills or experiences, suggesting they can back up their words with actions, though sometimes they cannot.
He can definitely talk the talk, but can he walk the walk?
He certainly knows how to speak impressively, but can he actually perform?
You should hear my boss, he knows how to talk the talk.
You should hear my boss; he knows how to speak well.
During the meeting, she could talk the talk impressing everyone with her industry knowledge.
During the meeting, she spoke impressively, impressing everyone with her knowledge.