“Document Center” in SharePoint solves a common problem:
How to make specific files available to a large group of users without giving them access to other files.
For example, in a project site with 100 files, one of these files is a final report and should be made available to all other users. Instead of modifying the permissions for this final report, band forcing each user to enter the project site to read it, SharePoint can make a copy of the file and store a read-only copy of it in a public document archive; that is, the Document Center. If the original document is later modified, the author can see that a copy exists in the Document Center and choose to update that copy.
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