The best way to prepare to answer the question "why should we hire you" is to research the organization and the desired abilities in an applicant. This common interview question is used to gauge how well a candidate's skills, experiences and interests align with an employer and position.
A candidate can prepare to respond with a few specific strengths, experiences or accomplishments and point out how they match noted duties or qualities of the position. A concise response, or "sales pitch," allows the applicant to focus on the most important attributes without distracting the hiring manager. A key selling point is to note something distinct in the applicant's background that is not common.