Be strong on something Definition 1 of 3Pro Tip 1/3Subject Mastery Use it to express expertise in a specific area or subject. She is strong on digital marketing strategies. Pro Tip 2/3Highlight Ability Emphasize someone's strong capability or performance in a field. Our new team member is strong on project management. Pro Tip 3/3Not Bragging It's a factual statement, not a boast about someone's skill set. He's strong on analytical thinking, which helps our research.