From the link: “The National Archives and Records Administration is releasing documents previously withheld in accordance with the JFK Assassination Records Collection Act. The vast majority of the Collection (88%) has been open in full and released to the public since the late 1990s. The records at issue are documents previously identified as assassination records, but withheld in full or withheld in part.
This release consists of 3,810 documents, including 441 formerly withheld-in-full documents and 3,369 documents formerly released with portions redacted. The documents originate from FBI and CIA series identified by the Assassination Records Review Board as assassination records. More releases will follow.”
88% of these documents were previously released, but were redacted in part. 12% have never been released. President Trump has released the unredacted versions of all 3810 documents, with more to come.
UPDATE: Since the question has come up a few times, this is the first batch of content, revised as of Oct 20. Scroll down on the webpage and you’ll see the notice of revision. As the webpage states, these are largely files that have already been released, but now released in their complete and unredacted form, plus a few more files. Additional files will be released in the future.
Here’s the link to the Kennedy files, recently declassified by President Trump.[link to www.archives.gov (secure)]