Important Note on the URL: The link you provided ([https://docs.google.com/spreadsheets/d/1y57qlQeWZaqQJ8QsnuFCeiKW6FZfpIXKEYMRNbrTpUs/](https://docs.google.com/spreadsheets/d/1y57qlQeWZaqQJ8QsnuFCeiKW6FZfpIXKEYMRNbrTpUs/)...) is the edit/view link. To embed it properly without Google Sheets' editing headers showing up, replace the src="..." URL above with the Publish to Web link generated in Step 1 (which usually starts with [https://docs.google.com/spreadsheets/d/e/2PACX-.../pubhtml](https://docs.google.com/spreadsheets/d/e/2PACX-.../pubhtml)).