Open your website or app where you want to add the spreadsheet
Go to the Google Spreadsheet you want to use
Click File
Click Share
Set the sharing access to Anyone with the link or the required permission level
Copy the spreadsheet link or embed code
If using a website builder, open the page editor
Add an embed, iframe, or HTML block
Paste the Google Spreadsheet embed code or link
Save or publish the page
If using Google Sheets in another app, connect your Google account if required
Select the spreadsheet from your Google Drive
Grant the requested permissions
Confirm the spreadsheet is added
Test the embedded or connected spreadsheet to make sure it loads correctly