How can I copy-paste google Doc spreadsheet URL?

I am trying to input a google docs spreadsheet into my prezi but it keeps saying techinical difficulty. I made the google docs public so anyone can view them. Where should I click on Prezi to copy-paste the URL?

Hi ANI,

Please make sure to download your google doc as a PDF, and then Insert this PDF in prezi.

For more information on how to do thisclick here.

Hope that clarifies your answer.
Best,
Nicole