In Moodle what does Email activated checkbox mean in User Profiles?

PleaseAccording answerto the Moodle docs “One can either enable or disable emails being sent to an address. Note that if this ifis youdisabled, can,students andwill thennot retagreceive itany asmail Moodle.whatsoever Thanksfrom the site.” http://docs.moodle.org/en/Edit_profile