Compensation is top of mind for me. An applicant [EDIT: application, not applicant] tracking system is well-positioned to have a solid, up-to-date view into the compensation landscape, unlike sites like Glassdoor and Blind which are more lagging and self-selecting. Balanced with privacy, there is some real opportunity here. Outside of compensation - all sorts of analytics pertaining to interview process, how quickly competitors fill their roles, that sort of data.