Professional accomplishments include measurable and impactful actions that demonstrate how successful the candidate was at a previous position. These often describe how the candidate surpassed expectations in the role.
Professional accomplishments can be added within the description of a role at a company on the resume. The accomplishments should give the person reviewing the resume a good idea of the capabilities of the person, as well as what their characteristics are. It will indicate how they drive towards success. In addition, the professional accomplishments should reflect what would be valuable in the position that the candidate is applying for, rather than the biggest and best things they've accomplished.