Is your pdf too large and you have to smaller it?
There are several way to reduce a pdf file size:
WITH NO SOFTWARE
Upload your file in one of some free online edit website dedicated to pdf.
One example? https://smallpdf.com/ – and click compress file
WITH ADOBE ACROBAT
Click on file, Save as Other -> Reduce Size PDF
WITH INDESIGN
If the file is originary of Indesign you can try:
1. export it with different parameters. The quickiest way is to choose ”smallest pdf size”
2. try the print tool, instead of exporting
3. reduce the quality or size of the attached images/links. If you don’t need transparency, flat each pdf or png file
Disclaimer: this is a fast guide, a tutorial, an how-to article that I personally wrote for you. Feel free to write here any kind of suggestion! It is helpful if you need to solve your problem, if you need a tip or if you are in trouble and you need an help!