How to add footnotes in Google Docs in 4 easy steps, to cite your research and provide links

It can be helpful to add footnotes in Google Docs to cite your research in a lengthy paper.
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You can add footnotes to a Google Doc on the web or in the Google Docs mobile app.
It's easy to add footnotes in Google Docs on the web by using the toolbar to select "Insert," and then "Footnote" in your desired location. 
The built-in feature automatically adds a supercript number where you want the note, then takes you to the bottom of the page to add your text