How to close a mac calendar when it receives a yellow advertisement?

The mac calendar receives the light-colored advertisement and closes it as follows:

1. In the settings of Apple mobile phone, click the location of AppleID;

2. After the 2.AppleID page opens, click the "iCloud" option;

3. Click the switch on the right side of "Calendar" (green is bright, and when it is bright, it is easy to receive calendar spam invitation advertisements);

4. According to your own needs, click and select "Keep on my iphone" or "Remove from my iphone". Mainly used to synchronize calendar schedules. If you don't want to keep the previously synchronized calendar schedule, you can select "Delete from My iphone". If you select any item, you can close the calendar, and you won't receive calendar spam invitation advertisements in the future.

Apple Calendar received yellow spam ads because calendar sharing was turned on in iCloud. After turning off calendar sharing in iCloud, you won't receive spam invitations.