收到了一封要我在DDL前交所有材料的邮件，但是没说缺啥

邮件内容：
Complete Your Northeastern University Application Today

We’d like to thank you for submitting your application for admission to Northeastern University. Please complete and send all required documents before the application deadline to be considered for admission.

For questions, you can contact an enrollment coach. We’re happy to assist you. You may also visit our Office of Global Services (OGS) site for more information.

We look forward to receiving your complete application to Northeastern.

没说缺啥，要怎么补交。online portal上也没看到任何信息。这份email难道只是ad campaign?
谢谢各位啦

补充内容 (2021-1-22 08:55):
我已经在1.15交了所有内容了，然后1.21收到了这份邮件，感觉很莫名其妙 :(

应该只是提醒DDL，交齐就不用管啦

感觉是群发的，我也是1/15提交的申请。1/22收到了一模一样的邮件，但是什么都没做，过了4天（1/26） 网站上显示材料complete并且在under review了