Click Connect Google from the Google Sheets integration page, complete Google consent, then return to Yournotify and choose the spreadsheet and sheet tab you want to sync.
Use the first row as column headers and keep one contact or event per row. Include stable columns for name, email, telephone, and any custom fields you want to store as attributes.
Map the sheet columns, choose the target list, Save the integration, then run Sync Now. Review Recent Sync Runs for created, updated, skipped, and error rows.