If you're comfortable with JavaScript, you can consider using the Google Sheets API to automate data entry. The API allows you to read and write data directly to Google Sheets programmatically. You can use a library like 'google-spreadsheet' in Node.js or 'gspread' in Python to interact with the API easily and automate the data entry process.

Another way to automate data entry from a website is by using Google Apps Script. With Apps Script, you can write custom scripts that interact with websites and retrieve data. You can create a function that fetches data from a specific webpage using the UrlFetchApp service and then manipulate that data to populate your Google Sheets.

You can use the IMPORTXML function in Google Sheets to extract data from a website. First, identify the XPath of the element you want to extract on the website. Then use the syntax '=IMPORTXML(url, xpath)' in a cell, replacing 'url' with the website URL and 'xpath' with the XPath expression. Google Sheets will fetch and display the data for you.