论文已经First online 还没有分配刊号

　　论文已经First online 还没有分配刊号。发版社为什么发来一个Sharing Information? 这个是什么意思，还有个链接，原文如下：
As part of the Springer Nature SharedIt initiative, you can now publicly share a full-text view-only version of your paper by using the link below. If you have selected an Open Access option for your paper, or where an individual can view content via a personal or institutional subscription, recipients of the link will also be able to download and print the PDF. All readers of your article via the shared link will also be able to use Enhanced PDF features such as annotation tools, one-click supplements, citation file exports and article metrics.