If you click Yes , the items in the Normal template, including any changes, will be available to all documents to which the ...

If you click Yes, the items in the Normal template, including any changes, will be available to all documents to which the Normal template is attached. If you click No, the changes will be discarded from the template. If you do not think you made changes to the Normal template, be cautious about loading it, because potentially malicious macros can be distributed in this way.