From the Public Library of Science Blog:
F1000Prime recommendations now appear on 3000 highly influential PLOS articles (this number will grow as more articles are added).
John Chodacki, Director of Product Management at PLOS said “Along with F1000Prime recommendations, researchers now have a diverse combination of metrics that more comprehensively evaluate the impact of an article.”
Increasing the range of PLOS ALM data sources helps tell a more complete story of how articles are used once they have been published – the F1000Prime metric is a new type in our suite, a qualitative recommendation, rather than a quantitative “share” or citation.