With the original content unchanged, compress the PDF file, open the browser, search for PDF compression, click to enter the PDF compression website, drag the PDF file to the specified location, and click Download after compression.

If the PDF file is too large, it will occupy the storage space on it, which will slow down the network transmission and slow down the opening speed. Therefore, in the case of the original content unchanged, the PDF file is compressed to facilitate storage and improve its transmission speed and opening speed.