Spam can enter your workspace in many ways. Everything from emails to phone calls to text messages is vulnerable to spam. And Google Calendar is no exception. Fortunately, there are ways to deal with spam.
How to: Block time in Google Calendar
Previously, Google had added a way to block invitation spam by allowing them “Only if the sender is known”. Now, in a recent email promotion, Google emphasizes how “[i]t’s now easier to block spam in Google Calendar”. What are these new changes and how can you use them to block spam in Google Calendar? Let’s find out.
Third-party apps are one of the biggest sources of unwanted spam in your Google Calendar. If you’ve allowed apps on your Android device to add events to your calendar, you could be exposing your account to event spam.
Google's Email Promotion shows you how to prevent this on your Android device.