How Do I Send a PDF Document That Is Too Big To Send?

I have created a Pages document which I have exported into a PDF document. The PDF document is too large to send. I need to divided it and break it down into 2 or 3 smaller PDF documents.
The PDF document as is, is too big. I need to send this document somehow, even if it means breaking it down into 2 or 3 PDF documents. I don’t know how to do that.
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Gail