How do I receive form submissions via Google Sheets?

1. Go to Site settings → Forms → Google Sheets.
2. Allow access to your Google account. A new table will be created in your Google Drive automatically – all the data from the form will be captured there.
3. Confirm or skip the step "Assign service to all forms on the website?".
4. If you skipped the previous step, go to the web page Editor, open the Content panel of the block containing the form and select Google Sheets as a Form data receiver service.
5. Publish all pages.

Detailed guide to saving form responses in Google Sheets: http://help.tilda.ws/formsgooglesheets