Focus on Quality, Not Quantity
Your answer should not be too long. Sometimes, a single word can convince the recruiter that you are the ideal candidate for the position. Think carefully about your greatest strength, such as responsibility, organisational skills, or even creativity.

Provide Examples
While formulating your response, mention examples of past successes in previous jobs to add credibility to your strengths. Choose situations where your key strength truly stood out.

Stay One Step Ahead of the Interviewer
A useful tip is to also mention a weakness. You could say, for example, “I am a responsible person, however…”. The advantage of doing this is that the recruiter will see that you acknowledge your weaknesses and are willing to improve.

Source: Universia