For a more professional hand-off, use the command. This ensures the recipient has all necessary fonts and images along with the compatible file. Go to File > Package .
The converter will process your file and provide a download link for the converted file. how to convert indesign file to older version link
If you want to bypass the manual Export step, Adobe created a . While it was made for CS6/CC, it works for most modern versions. For a more professional hand-off, use the command