What does "notifier" mean?

A person or thing which notifies or provides notification.

What is a synonym for "notifier"?

Common synonyms include: adviser, announcer, authority, channel, communicant, enlightener.

noun

noun ·Rare ·Advanced level

Noun

1
A person or thing which notifies or provides notification.
"The e-mail notifier displays a small icon in the notification area when mail is received."

"The e-mail notifier displays a small icon in the notification area when mail is received."

From notify + -er.