Journal and article metrics are increasingly important across academic publishing. They can help researchers choose which journal to submit their work to, and assess the ongoing impact of an individual piece of work (including their own). Journal editors use them to assess their journals’ standing in the community, raise its profile, and potentially attract quality submissions. And metrics can also assist librarians in selecting journals for their institution and analysing their usage and impact, as well as helping them assess the impact of research published by those in their institution.