Your .ics file has been downloaded. If you have done this on your phone, you may be finished. If you are on your laptop using Google Calendar, here are the instructions:
Open your calendar application.
On the main calendar page, click the "+", then choose "Import" from the dropdown list.
Select the .ics file you downloaded.
Choose the calendar where you want to import these events.
Click Import.
You may need to refresh your calendar before seeing the changes.