You can download the answers of a form. This can be forms added to an opportunity or a form (such as contact form) on a page.
Click on your profile icon and go to your organization page
Click on "edit" in the menu on the left
Click on "responses"
Click on "export"
The data will be downloaded as a .csv file.
You can find the file in your downloads folder
To view this data in Excel, right click on the file and click "open with Excel" (or similar, depending on your computer).