From a Crossref Blog Post:
Participation Reports gives—for the first time—a clear visualization of the metadata that Crossref has. Search for any member to find out what percentage of their content includes 10 key elements of information, above and beyond the basic bibliographic metadata that all members are obliged to provide. This includes metadata such as ORCID iDs for contributors, funding acknowledgements, reference lists, and abstracts—richer metadata that makes content more discoverable, and much more useful to the scholarly community as a whole, including among members themselves.
You can filter by content such as journal articles, book chapters, datasets, and preprints, and compare current content (past two calendar years and year-to-date) to back file content (older than that). And within the journal articles view, you can drill down to view the metadata completeness for each individual journal. We hear that editorial boards are keen to see that aspect!
Read the Complete Blog Post
Direct to Crossref Participation Reports