Refers to a high degree of skill, but doesn't mean the person is the best or perfect. Even if he's competent in graphic design, he still learns new techniques.
Pro Tip 2/3
Beyond Basics
'Competent' suggests more than just basic knowledge; it implies reliable performance. After six months of training, she became competent at data analysis.
Pro Tip 3/3
Skill Specific
Use 'competent in' or 'competent at' to specify the area of competence. He is particularly competent in handling customer complaints.