What does Apple Watch mean by blocking contacts?

Apple Watch blocking contacts means limiting the information and notifications of blocked contacts so that these information are not displayed on the watch.

Apple Watch's contacts have a blocking function, and the contacts in the blocked list will not be able to send information directly to Apple Watch.

Apple Watch has a sapphire screen and has two screen sizes. It supports dozens of functions, such as telephone, voice message, car connection, weather and flight information, map navigation, music playing, heartbeat measurement, step counting and so on. It is an omni-directional health and movement tracking device.