How to Export an InDesign File to PDF
Illustrator and Photoshop files can be directly saved as PDFs. But, InDesign files must be exported to PDFs. Watch this video to see the key steps in creating a print-ready PDF from an InDesign file.
NOTE: when exporting a PDF for an actual print project that you will send to a print vendor, you DO NOT want the guides and grids to show. So, be sure to de-select "Visible Guides and Grids" in the export screen's "Include" section.